At the A1 level, 'completion' is a bit advanced, but you can understand it as 'finishing.' When you finish your homework, that is the completion of your homework. Think about a game. When you reach the end of the game, that is completion. You might see this word on a computer. When you download a picture, a bar shows you how much is done. When it reaches 100%, that is completion. It means 'all done.' You can use it to talk about simple things. 'I finished my book' is the same as 'The completion of my book.' It is a noun, so it is a thing, not an action. You use 'finish' for the action and 'completion' for the idea of being finished. It is good to know this word because you will see it on forms and on the internet. For example, 'Form completion' means you have filled in all the boxes. It is a very useful word for showing that you have done everything you needed to do. Just remember: completion = finished.
At the A2 level, you can start using 'completion' in more specific ways. It is the noun form of the verb 'complete.' You often hear it in school or at work. For example, your teacher might talk about the 'completion of the course.' This means finishing all the lessons and tests. You might also hear it when people talk about building things. 'The completion of the new park will be in June.' This means the park will be ready for people to use in June. A common phrase is 'near completion.' This means something is almost finished. 'My project is near completion' sounds more professional than 'My project is almost done.' You can also use it with 'date.' A 'completion date' is the day something must be finished. It is important to use 'of' after completion. You say 'the completion of the task,' not 'the completion the task.' Learning this word helps you talk about your progress and your goals more clearly. It shows that you understand the process of working on something until it is totally finished.
At the B1 level, 'completion' becomes a key word for describing professional and academic processes. You should be comfortable using it in phrases like 'upon completion of' and 'towards completion.' 'Upon completion of the training, you will get a certificate' is a very common structure in business and education. It means 'as soon as you finish.' You also start to see 'completion' in technical contexts. For example, in IT, 'auto-completion' is a feature that finishes words for you. In sports, a 'pass completion' is a successful throw and catch. At this level, you should also understand the difference between 'completion' and 'complete.' 'Complete' is the verb or adjective, while 'completion' is the noun. For instance, 'I need to complete this' (verb) versus 'The completion of this is important' (noun). You might also encounter 'completion rates,' which are used to measure how many people finish a program. Using 'completion' instead of just 'finishing' makes your English sound more formal and precise. It is a great word for writing reports, emails, and essays where you need to discuss the end of a project or a period of study.
At the B2 level, you should understand the nuances of 'completion' in various professional fields. In real estate, 'completion' is the specific legal day when a property sale is finalized. In project management, you might discuss 'substantial completion,' which means a project is functional even if minor tasks remain. You should also be able to use 'completion' to discuss abstract concepts, like the 'completion of a life cycle' or the 'completion of a logical argument.' At this level, you can compare 'completion' with synonyms like 'finalization,' 'culmination,' and 'conclusion.' For example, you might choose 'culmination' to describe the peak of a career, but 'completion' to describe the end of a specific contract. You should also be aware of common collocations like 'timely completion,' 'satisfactory completion,' and 'successful completion.' These adjectives help you describe *how* something was finished. Your ability to use 'completion' in complex sentence structures, such as 'The project's completion was delayed by unforeseen circumstances,' shows a high level of grammatical control. It is a word that adds a layer of sophistication to your professional communication.
At the C1 level, you use 'completion' with high precision and in diverse contexts. You understand its role in legal contracts, where 'completion' triggers specific obligations and payments. You are also aware of its psychological implications, such as the 'need for completion' or 'closure' in human behavior. You can use the word to discuss complex systems, noting that the 'completion of a circuit' or the 'completion of a data set' is essential for functionality. You are also skilled at avoiding 'nominalization' when it isn't necessary, choosing the verb 'complete' for directness, but using the noun 'completion' when the focus is on the state or the process itself. You can distinguish between 'completion' (the act of finishing) and 'completeness' (the state of being whole). For example, 'The completion of the audit ensured the completeness of the financial records.' This level of detail shows a deep mastery of the language. You also recognize the word in literary contexts, where the 'completion of a character arc' provides thematic resolution. Your use of 'completion' is not just about finishing tasks; it is about describing the structural and logical integrity of any process or idea.
At the C2 level, 'completion' is a tool for nuanced and sophisticated expression. You can use it to discuss philosophical ideas, such as the 'completion of the self' or the 'teleological completion' of a historical process. You understand its most technical applications in fields like law, finance, and engineering, where 'completion' is a precisely defined milestone with significant ramifications. You can use it in highly formal writing to create complex, balanced sentences: 'The successful completion of the merger, while fraught with regulatory hurdles, ultimately solidified the firm's dominance in the global market.' You are also sensitive to the rhythmic and stylistic effects of using 'completion' versus its synonyms. You might choose 'culmination' for its grander, more emotional tone, or 'termination' for its clinical finality, using 'completion' as the standard, versatile term for the fulfillment of a plan. Your mastery extends to idiomatic and metaphorical uses, and you can effortlessly navigate the word's various registers, from technical manuals to high-level academic discourse. At this level, 'completion' is not just a vocabulary word; it is a concept you can manipulate to convey precise shades of meaning about the end, the whole, and the fulfilled.

completion in 30 Seconds

  • Completion is a noun meaning the act of finishing a task or the state of being finished. It is the noun form of 'complete'.
  • It is commonly used in formal, professional, and academic contexts to describe the end of a project, course, or legal process.
  • Common phrases include 'upon completion of,' 'near completion,' and 'completion date,' which help specify when or how something is finished.
  • In technology and sports, it has specific meanings like 'auto-completion' or a 'pass completion' in American football, showing its versatility.

The word completion is a versatile noun that describes the act of finishing a task, project, or process. It is derived from the verb 'complete,' and it carries a sense of fulfillment and wholeness. In everyday language, we use it to mark the transition from a state of 'work in progress' to a state of 'finality.' Whether you are talking about finishing a marathon, ending a school year, or finalizing a business contract, 'completion' is the term that encapsulates that moment of reaching the finish line. It is not just about stopping; it is about reaching the intended goal or state. For example, the completion of a building involves not just the physical construction but also the final inspections and the handing over of keys. It implies that nothing more needs to be added or changed.

The Act of Finishing
This refers to the physical or mental effort required to reach the end of a process. For instance, 'The completion of the report took three days of intense research and writing.'
The State of Being Finished
This refers to the condition of a project once it is done. 'The project is nearing completion' means it is almost in its final state.

In professional settings, 'completion' is often used in a formal context. Project managers track 'completion rates' to measure productivity. In legal and real estate contexts, 'completion' has a very specific meaning: it is the day when the ownership of a property is legally transferred from the seller to the buyer. This highlights how the word can shift from a general concept of 'finishing' to a specific, legally binding event. Furthermore, in psychology, the 'need for completion' or 'closure' describes the human drive to resolve ambiguous situations and reach a definitive conclusion. This shows that the word operates on both a practical level (finishing a puzzle) and a deep psychological level (resolving a conflict).

The successful completion of the training program is a prerequisite for the promotion.

We also see this word frequently in the digital world. Think about 'auto-completion' features on your smartphone or search engine. These tools predict what you are going to type and offer to finish the word or sentence for you. This usage emphasizes the aspect of 'making whole' or 'filling in the gaps.' Similarly, 'form completion' refers to the act of filling out all the required fields in a document. In these contexts, completion is synonymous with accuracy and thoroughness. If a form is incomplete, it cannot be processed; therefore, completion is the necessary state for progress to occur.

Upon completion of the course, students will receive a certificate of achievement.

Culturally, completion is often celebrated. Graduation ceremonies are the completion of a degree; ribbon-cutting ceremonies mark the completion of a new bridge or building. This suggests that completion is not just a logistical end-point but a milestone worth acknowledging. It represents the culmination of effort, resources, and time. In literature and film, the completion of a character's journey often provides the audience with a sense of satisfaction, known as catharsis. This emotional resonance makes 'completion' a powerful word that goes beyond mere productivity.

Academic Context
Refers to finishing a degree, a thesis, or a specific module of study. 'The completion of her PhD took five years.'

The completion date for the new stadium has been pushed back due to weather delays.

Finally, it is important to distinguish 'completion' from 'conclusion.' While they are similar, 'completion' often implies that a specific task or structure is now whole and functional, whereas 'conclusion' often refers to the end of a narrative, an argument, or a period of time. You complete a puzzle, but you conclude a speech. Understanding these subtle differences helps in choosing the most precise word for your writing. In summary, 'completion' is about wholeness, fulfillment, and the successful end of a process, making it an essential word for describing achievements in all areas of life.

Using the word completion correctly requires an understanding of its grammatical role as a noun. It often appears in prepositional phrases that indicate time or condition. One of the most common structures is 'upon completion of [something],' which means 'as soon as [something] is finished.' This is a formal way to describe a sequence of events. For example, 'Upon completion of the medical exam, you may return to work.' This structure is frequently found in contracts, instruction manuals, and formal correspondence. It sets a clear condition that must be met before the next step can occur.

Near Completion
This phrase is used to indicate that a project is almost finished. 'The renovations are near completion, and we hope to move in next week.'
Date of Completion
This refers to the specific deadline or the actual day a task was finished. 'The estimated date of completion for the software update is October 15th.'

Another common way to use 'completion' is as the subject or object of a sentence to discuss the progress of a large-scale endeavor. You might say, 'The completion of the Great Wall of China took centuries.' Here, 'completion' is the central focus of the sentence. It can also be modified by adjectives to provide more detail about how the task was finished. Words like 'successful,' 'timely,' 'satisfactory,' or 'partial' are often paired with 'completion.' For instance, 'The timely completion of the project earned the team a bonus.' This highlights the importance of the manner in which the goal was reached, not just the fact that it was reached.

We are awaiting the completion of the background check before finalizing the job offer.

In technical or academic writing, 'completion' is used to describe the state of a data set or a logical process. For example, 'The completion of the sequence requires one more variable.' In this context, it refers to the logical necessity of having all parts present for a system to function. It is also used in the phrase 'certificate of completion,' which is a standard document given to people who finish a short course or training program. This is different from a 'degree,' as it specifically acknowledges that a specific set of requirements has been met.

The completion of the merger will create the largest telecommunications company in the country.

When discussing sports, 'completion' has a very specific meaning in American football. A 'pass completion' occurs when the quarterback successfully throws the ball to a receiver who catches it. This is a great example of how a general word becomes a technical term within a specific field. In this case, completion is a binary state: either the pass was completed or it was incomplete. This binary nature—done or not done—is at the heart of the word's meaning across all contexts. Whether it is a pass, a building, or a sentence, completion signifies that the intended action has been successfully realized.

Full Completion
Used to emphasize that every single detail has been finished. 'The project will not be considered a success without full completion of the safety protocols.'

There was a sense of collective relief among the crew following the completion of the dangerous mission.

In summary, using 'completion' involves identifying the process that is ending and choosing the right preposition or adjective to describe that ending. It is a word that brings a sense of structure and finality to your sentences, making it indispensable for formal, technical, and professional communication. By mastering its use in phrases like 'upon completion' and 'near completion,' you can express complex ideas about time and progress with clarity and precision.

You will encounter the word completion in a variety of real-world environments, ranging from the workplace to your digital devices. One of the most common places is in the business world. During meetings, managers often ask for 'completion dates' or 'completion percentages' for ongoing projects. This helps them track progress and allocate resources. If you work in construction or engineering, 'completion' is a constant topic of conversation. You might hear about 'substantial completion,' which is a legal term meaning the project is finished enough to be used for its intended purpose, even if minor details are still being worked on.

In the Office
'We need to ensure the completion of all tax forms by the end of the fiscal year.' This usage is about compliance and deadlines.
In Education
'Completion rates' are a key metric for universities, measuring how many students actually finish their degrees compared to how many started.

In the realm of technology, 'completion' is a term you interact with every day, even if you don't realize it. 'Auto-complete' is a feature in search engines and messaging apps that suggests the completion of your words. When you download a file, you see a progress bar that shows the 'percentage of completion.' In these instances, completion is about data transfer and user experience. It provides feedback to the user, letting them know how much longer they have to wait. This digital context has made the word 'completion' synonymous with efficiency and automated assistance.

The completion of the software installation may require you to restart your computer.

Legal and financial documents are another major source of this word. When buying a house, the 'completion statement' is a document that outlines all the financial transactions involved in the sale. In contracts, you will often see clauses that specify what constitutes 'satisfactory completion' of services. This is crucial for resolving disputes, as it defines exactly when a contractor has fulfilled their obligations and is entitled to payment. In this context, completion is not just a concept; it is a legal requirement that triggers financial consequences.

The completion of the marathon was the proudest moment of his life.

In sports broadcasting, particularly American football, you will hear the word 'completion' dozens of times per game. Commentators will discuss a quarterback's 'completion percentage,' which is a vital statistic for evaluating their performance. This specific usage has permeated general sports culture, where 'completing a play' or 'completing a pass' is a standard way to describe a successful athletic action. Even in video games, players often strive for '100% completion,' meaning they have found every secret and finished every side quest. This shows how the word has become a marker of mastery and thoroughness in entertainment.

In Healthcare
Doctors often emphasize the 'completion of the antibiotic course' to ensure that an infection is fully cleared and to prevent antibiotic resistance.

The city council celebrated the completion of the new public park with a community picnic.

Finally, you hear 'completion' in personal development and self-help contexts. People talk about the 'completion of a goal' or the 'completion of a phase in life.' It is a word that signifies growth and the moving on to something new. Whether it is a professional milestone, a legal requirement, a technological process, or a personal achievement, 'completion' is the word we use to signal that a journey has reached its destination. Its presence across so many different fields highlights its fundamental importance in how we organize and understand our activities.

While completion is a common word, it is frequently misused or confused with other similar terms. One of the most frequent mistakes is confusing 'completion' with 'completeness.' While they share the same root, they have different meanings. 'Completion' refers to the *act* or *process* of finishing something. 'Completeness' refers to the *state* of having all the necessary parts. For example, you talk about the 'completion of a project' (finishing it), but the 'completeness of a data set' (ensuring no data is missing). Using 'completeness' when you mean 'completion' can make your writing sound awkward or technically incorrect.

Completion vs. Finish
'Finish' is often a verb, while 'completion' is the noun. A common mistake is saying 'The finish of the project' instead of 'The completion of the project' in formal writing. 'Finish' as a noun usually refers to the surface texture of an object (like a wood finish) or the very end of a race.
Completion vs. Conclusion
As mentioned before, 'conclusion' is for endings of stories or arguments. You wouldn't say 'the completion of the movie' unless you were talking about the production process. You would say 'the conclusion of the movie' to refer to the final scenes.

Another mistake involves the preposition used with 'completion.' Many learners are unsure whether to use 'of,' 'in,' or 'at.' The standard and most correct preposition is 'of.' You speak of the 'completion of the task.' Using 'completion in the task' or 'completion at the task' is grammatically incorrect. Furthermore, when using the phrase 'upon completion,' it must be followed by 'of.' For example, 'Upon completion of the form...' is correct. Omitting the 'of' is a common error in hurried writing.

Incorrect: The completeness of the building took two years.
Correct: The completion of the building took two years.

There is also a tendency to over-formalize sentences by using 'completion' when a simpler verb would suffice. This is known as 'nominalization'—turning verbs into nouns. For example, instead of saying 'We will complete the project by Friday,' someone might say 'The completion of the project will occur by Friday.' While the second sentence is not grammatically wrong, it is wordier and less direct. In casual conversation, this can sound stiff and unnatural. It is important to choose 'completion' when you specifically need to discuss the *concept* of the finish, rather than just the action itself.

Incorrect: He is waiting for the complete of his degree.
Correct: He is waiting for the completion of his degree.

In American football contexts, a 'completion' is a specific stat. A common mistake for non-fans is to call any caught ball a completion. However, a completion only refers to a forward pass from the quarterback to a receiver. If the ball is handed off or thrown backward, it is not a completion. This is a very specific technical error, but it illustrates how important context is when using this word. Similarly, in real estate, 'completion' is a specific legal day. Confusing it with 'exchange of contracts' (which happens earlier) can lead to significant misunderstandings in a property transaction.

Spelling Error
Some people mistakenly spell it 'compleation.' Remember that it follows the spelling of 'complete' but drops the 'e' before adding 'ion.'

Incorrect: Upon completion the course, you get a badge.
Correct: Upon completion of the course, you get a badge.

By being aware of these common pitfalls—confusing it with 'completeness,' using the wrong preposition, or overusing it in place of a simple verb—you can use 'completion' more effectively and accurately. It is a powerful word when used correctly, providing a sense of professional polish and clarity to your descriptions of finished work.

The word completion has several synonyms, each with its own nuance. Choosing the right one depends on the context and the 'flavor' you want to give your sentence. The most direct synonym is 'finishing,' but 'finishing' is often seen as more casual. 'Finalization' is another close relative, often used in business to describe the very last steps of a process, like 'the finalization of the budget.' While completion covers the whole process of reaching the end, finalization emphasizes the act of making something final and unchangeable.

Completion vs. Conclusion
As discussed, 'completion' is for tasks and structures, while 'conclusion' is for narratives, speeches, and logical arguments. You complete a marathon; you conclude a presentation.
Completion vs. Termination
'Termination' implies an end that might be abrupt or forced, such as the termination of a contract or a job. 'Completion' implies a natural and successful end to a planned process.

'Culmination' is a more sophisticated alternative. It refers to the highest or most climatic point of something, especially after a long period of time. You might say, 'The award was the culmination of his life's work.' This goes beyond mere completion; it suggests that the end point is a peak of achievement. 'Fulfillment' is another related word, often used in the context of promises, duties, or personal desires. 'The fulfillment of his duties' means he did what was expected of him. In a commercial sense, 'order fulfillment' refers to the entire process from receiving an order to delivering it to the customer.

The finalization of the treaty took months of negotiation.

In technical fields, you might hear 'attainment.' This is often used when reaching a specific level or goal, such as 'the attainment of a degree' or 'the attainment of a sales target.' While similar to completion, attainment focuses more on the *achievement* aspect. 'Realization' is also used when a plan or a dream becomes a reality. 'The realization of the project' means it has been successfully carried out. Each of these words adds a slightly different meaning: completion is about the end of the process, culmination is about the peak, fulfillment is about satisfying a requirement, and realization is about making something real.

The culmination of the festival was a spectacular fireworks display.

When looking for antonyms, the most obvious are 'beginning,' 'start,' and 'commencement.' However, 'incompletion' or 'non-completion' are more direct opposites in a formal context. If a project is 'incomplete,' it lacks necessary parts. If there is 'non-completion' of a contract, it means the required work was not done. 'Initiation' is another antonym, referring to the very first step of a process. Understanding these opposites helps define the boundaries of what 'completion' truly means: it is the far end of a journey that began with initiation and commencement.

Completion vs. Achievement
Achievement focuses on the success and the effort, while completion focuses on the fact that the task is finished. You can complete a task without it being a great achievement.

The commencement of the construction was delayed by several weeks.

In conclusion, while 'completion' is a robust and widely applicable word, its synonyms like 'finalization,' 'culmination,' and 'fulfillment' allow for greater precision in your writing. By choosing the word that best fits the specific nature of the 'ending' you are describing, you can communicate more clearly and effectively. Whether you are describing the end of a simple task or the peak of a lifelong ambition, there is a word that perfectly captures that moment of finishing.

How Formal Is It?

Formal

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Neutral

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Informal

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Child friendly

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Slang

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Fun Fact

The root 'plere' (to fill) is also found in words like 'plenty,' 'supply,' and 'replenish.' All these words share the core idea of filling something to capacity.

Pronunciation Guide

UK /kəmˈpliːʃn/
US /kəmˈpliːʃn/
The primary stress is on the second syllable: com-PLE-tion.
Rhymes With
deletion depletion secretion accretion repletion excretion concretion completion (self-rhyme)
Common Errors
  • Pronouncing the 'com' too strongly (like 'comm-pletion').
  • Adding an extra 'e' sound (like 'com-plee-tee-on').
  • Misplacing the stress on the first or third syllable.
  • Confusing the 'shun' sound with 'see-on'.
  • Failing to reduce the first vowel to a schwa /ə/.

Difficulty Rating

Reading 3/5

Common in formal texts, but the meaning is usually clear from context.

Writing 4/5

Requires knowledge of prepositions and formal phrasing like 'upon completion'.

Speaking 3/5

Easy to use in phrases like 'near completion', but 'finish' is more common in casual speech.

Listening 3/5

Clear pronunciation, though the weak first syllable can be missed in fast speech.

What to Learn Next

Prerequisites

complete finish end part whole

Learn Next

finalization culmination conclusion fulfillment attainment

Advanced

substantial completion teleological catharsis divestiture prerequisite

Grammar to Know

Nominalization

Changing 'We completed the project' to 'The completion of the project' makes it more formal.

Prepositional Phrases with 'Upon'

'Upon completion of the task' is a formal way to say 'After finishing the task'.

Noun-Noun Compounds

'Completion date' and 'completion rate' are common compound nouns.

Countability of Abstract Nouns

'Completion' is usually uncountable but can be countable in sports (e.g., 'five completions').

Adjective Placement

Adjectives like 'successful' or 'timely' usually come before 'completion'.

Examples by Level

1

The completion of the puzzle made him happy.

Finishing the puzzle made him happy.

Noun used as the subject of the sentence.

2

I am waiting for the completion of the download.

I am waiting for the download to finish.

Used with the preposition 'of'.

3

The completion of the game took one hour.

It took one hour to finish the game.

Refers to the time taken to finish.

4

Please check the form for completion.

Check if the form is all finished.

Used as an object of a preposition.

5

The completion of my homework is important.

Finishing my homework is important.

Noun phrase acting as a subject.

6

We celebrated the completion of the project.

We had a party because the project was done.

Direct object of the verb 'celebrated'.

7

The completion of the race was very exciting.

The end of the race was exciting.

Refers to a specific event.

8

Is the completion of the work near?

Is the work almost finished?

Used in a question about progress.

1

The completion of the new school will be next month.

The school will be finished next month.

Future tense context.

2

She received a certificate for the completion of the course.

She got a paper because she finished the class.

Common academic phrase.

3

The project is near completion.

The project is almost done.

The phrase 'near completion' indicates progress.

4

What is the expected completion date?

When do you think it will be finished?

Compound noun phrase 'completion date'.

5

The completion of the bridge improved traffic.

Traffic got better after the bridge was finished.

Shows a result of the completion.

6

He worked hard for the completion of his book.

He worked hard to finish his book.

Refers to a long-term goal.

7

The completion of the task was a relief.

Finishing the task made him feel better.

Abstract noun as a subject.

8

They are planning the completion of the renovation.

They are planning how to finish the repairs.

Used with a continuous verb.

1

Upon completion of the form, please submit it to the office.

After you finish the form, give it to the office.

Formal phrase 'Upon completion of'.

2

The software uses auto-completion to save time.

The software finishes words for you.

Technical term 'auto-completion'.

3

The quarterback's completion rate was very high.

The football player caught many passes.

Sports-specific usage.

4

The completion of the merger took several months.

It took months for the two companies to become one.

Business context.

5

We are working towards the completion of the report.

We are trying to finish the report.

Phrase 'working towards the completion of'.

6

The completion of the training is mandatory for all staff.

Everyone must finish the training.

Used to describe a requirement.

7

There were many delays in the completion of the highway.

The highway took a long time to finish.

Refers to obstacles in a process.

8

The completion of the cycle takes about twenty-four hours.

The whole process finishes in a day.

Scientific/Technical context.

1

The project reached substantial completion ahead of schedule.

The project was mostly finished early.

Technical term 'substantial completion'.

2

The completion of the legal proceedings brought closure to the family.

The end of the court case helped the family feel better.

Abstract and emotional context.

3

The timely completion of the audit is crucial for the company.

Finishing the audit on time is very important.

Adjective 'timely' modifying 'completion'.

4

The completion of the transaction is subject to regulatory approval.

The deal can only finish if the government says yes.

Formal conditional structure.

5

The completion of the symphony was the composer's final act.

Finishing the music was the last thing the composer did.

Refers to a creative process.

6

We are evaluating the completion of the objectives.

We are checking if the goals were met.

Used in management and evaluation.

7

The completion of the data set allowed for a more accurate analysis.

Having all the data made the study better.

Scientific/Analytical context.

8

The certificate of completion is recognized by the industry.

The paper saying you finished is accepted by companies.

Standard phrase 'certificate of completion'.

1

The completion of the human genome project was a landmark achievement.

Finishing the DNA map was a huge moment for science.

Refers to a major scientific milestone.

2

The contract specifies penalties for the non-completion of the work.

The contract says you must pay if you don't finish.

Formal term 'non-completion'.

3

The completion of the narrative arc provided a satisfying resolution.

The way the story ended made the readers happy.

Literary analysis context.

4

The completion of the electrical circuit is necessary for the device to function.

The wires must all connect for the machine to work.

Technical/Scientific context.

5

The completion of the merger was contingent upon several divestitures.

The deal could only finish if some parts were sold off.

High-level business/legal vocabulary.

6

The completion of the cathedral spanned several generations of architects.

Finishing the big church took many years and many people.

Historical and architectural context.

7

The psychological need for completion can drive people to finish even tedious tasks.

People want to finish things because of how their minds work.

Psychological/Academic context.

8

The completion of the investigation revealed a complex web of corruption.

Finishing the search for truth showed many bad things.

Formal investigative context.

1

The completion of the treaty represented a tectonic shift in international relations.

Finishing the agreement changed how countries work together.

Metaphorical and high-level political context.

2

The work's completion was hindered by an intractable series of logistical failures.

Finishing the work was stopped by many hard-to-fix problems.

Advanced vocabulary ('intractable', 'logistical').

3

The completion of the philosophical system was the author's lifelong ambition.

Finishing his big ideas was what he always wanted.

Abstract and academic context.

4

The completion of the architectural masterpiece was marred by aesthetic controversies.

Finishing the great building was spoiled by arguments about its looks.

Nuanced and descriptive context.

5

The completion of the ritual was believed to ensure the prosperity of the harvest.

Finishing the ceremony was thought to bring good crops.

Anthropological/Cultural context.

6

The completion of the data migration must be verified by a third-party auditor.

An outside person must check that the data was moved correctly.

Highly technical and formal business context.

7

The completion of the poem's final stanza brought a sense of profound catharsis.

Finishing the last part of the poem made him feel a big emotional release.

Literary and emotional context.

8

The completion of the urban renewal project revitalized the city's downtown core.

Finishing the city repairs made the center of town lively again.

Sociological and urban planning context.

Common Collocations

successful completion
timely completion
near completion
completion date
upon completion
certificate of completion
completion rate
satisfactory completion
full completion
awaiting completion

Common Phrases

Towards completion

— Moving closer to finishing. Used to describe progress.

The work is moving steadily towards completion.

Subject to completion

— Depending on something being finished. Often used in legal terms.

The deal is subject to the completion of the audit.

Percentage of completion

— How much of a task is done, expressed as a number.

The percentage of completion is currently at 75%.

Nearing completion

— Almost finished. Similar to 'near completion'.

The renovations are nearing completion.

Post-completion

— Occurring after something is finished.

We will have a post-completion review next week.

Pre-completion

— Occurring before something is finished.

The pre-completion inspection revealed some minor issues.

Date of completion

— The specific day a task was or will be finished.

Please record the date of completion on the form.

In completion of

— As a way to finish something. Less common but formal.

He wrote a final chapter in completion of the series.

Target completion

— The goal for when something should be finished.

Our target completion for the update is Friday.

Awaiting completion of

— Waiting for a specific process to finish.

We are awaiting completion of the repairs.

Often Confused With

completion vs completeness

Completeness is the state of being whole (no parts missing). Completion is the act of finishing.

completion vs conclusion

Conclusion is for stories or arguments. Completion is for tasks or physical structures.

completion vs finish

Finish is often a verb. As a noun, it usually refers to a surface or the very end of a race.

Idioms & Expressions

"Bring to completion"

— To finish something successfully. Often used for long projects.

It took three years to bring the project to completion.

formal
"See through to completion"

— To stay with a task until it is finished, despite difficulties.

He promised to see the investigation through to completion.

neutral
"Near the finish line"

— Very close to completion. A metaphorical idiom.

We are near the finish line with this contract.

informal
"Tie up loose ends"

— To finish the small, final details of a project.

We just need to tie up some loose ends before completion.

informal
"Put the finishing touches on"

— To add the final details to make something perfect.

She is putting the finishing touches on the completion of her painting.

neutral
"Cross the t's and dot the i's"

— To ensure every small detail is completed correctly.

We need to cross the t's and dot the i's for the completion of the deal.

informal
"The home stretch"

— The final part of a long process leading to completion.

We are in the home stretch of the project's completion.

informal
"Done and dusted"

— Completely finished and successful.

Once the paperwork is signed, the completion will be done and dusted.

informal
"Seal the deal"

— To complete a business transaction or agreement.

The signing of the papers will seal the deal and mark the completion.

neutral
"Wrap it up"

— To finish a task or a meeting.

Let's wrap it up and head towards completion.

informal

Easily Confused

completion vs Complement

Similar spelling and sound.

A complement is something that completes or goes well with something else. Completion is the act of finishing.

The wine was a perfect complement to the meal, which marked the completion of the dinner.

completion vs Compliment

Very similar spelling.

A compliment is a polite expression of praise. Completion is the act of finishing.

He received a compliment on the successful completion of his project.

completion vs Compliance

Starts with 'com-' and relates to following rules.

Compliance is the act of obeying a rule or request. Completion is finishing a task.

Compliance with the safety rules was checked after the completion of the work.

completion vs Complex

Starts with 'com-'.

Complex means complicated. Completion is finishing.

The completion of the complex project took many years.

completion vs Compulsion

Starts with 'com-' and ends with '-ion'.

Compulsion is an irresistible urge to do something. Completion is finishing a task.

He felt a compulsion to work until the completion of the task.

Sentence Patterns

A1

The completion of [noun] is [adjective].

The completion of the puzzle is good.

A2

[Noun] is near completion.

The house is near completion.

B1

Upon completion of [noun], [clause].

Upon completion of the course, you will get a badge.

B1

We are working towards the completion of [noun].

We are working towards the completion of the report.

B2

The [adjective] completion of [noun] is [adjective].

The timely completion of the audit is essential.

C1

The completion of [noun] was contingent upon [noun].

The completion of the merger was contingent upon approval.

C1

[Noun] specifies penalties for non-completion.

The contract specifies penalties for non-completion.

C2

The completion of [noun] provided a sense of [abstract noun].

The completion of the poem provided a sense of profound catharsis.

Word Family

Nouns

Verbs

Adjectives

Related

How to Use It

frequency

Common in professional, academic, and technical writing. Less common in very casual speech.

Common Mistakes
  • Using 'completeness' instead of 'completion'. The completion of the project took two years.

    'Completion' is the act of finishing. 'Completeness' is the state of having all parts. You finish a project (completion), you don't 'state' it (completeness).

  • Saying 'completion the task' without 'of'. We are waiting for the completion of the task.

    'Completion' is a noun that requires the preposition 'of' to connect it to the object being finished.

  • Spelling it 'compleation'. The completion date is Friday.

    The 'e' in 'complete' is dropped when adding the suffix '-ion'.

  • Using 'completion' for the end of a movie or story. The conclusion of the movie was exciting.

    'Conclusion' is the standard term for the end of a narrative or artistic work. 'Completion' refers more to the production process.

  • Overusing 'completion' in casual speech. I'm finishing my homework.

    While 'The completion of my homework' is grammatically correct, it sounds too formal for a casual conversation with friends or family.

Tips

Use 'of' after completion

When you want to say what was finished, always use the preposition 'of'. For example, 'the completion of the task' is correct, but 'the completion the task' is not. This is a very common mistake for learners.

Formal vs. Informal

Use 'completion' in professional emails and reports. In casual conversation, 'finishing' often sounds more natural. For example, 'I'm finishing my lunch' is better than 'I am at the completion of my lunch' when talking to friends.

Completion vs. Conclusion

Use 'completion' for tasks, buildings, and projects. Use 'conclusion' for the end of a story, a speech, or a meeting. You complete a marathon, but you conclude a presentation. This distinction shows a high level of English mastery.

Substantial Completion

In business and construction, 'substantial completion' is a key term. It means the work is done enough to be used. Knowing this term can be very helpful if you work in these industries, as it has legal and financial meanings.

Auto-complete

The word 'completion' is the root of 'auto-complete.' Understanding this helps you realize that the feature is literally 'completing' your words for you. This is a great way to remember the word's meaning in a modern context.

Upon Completion

The phrase 'Upon completion of...' is a very useful formal way to start a sentence. It means 'As soon as [something] is finished.' For example, 'Upon completion of the exam, please leave the room quietly.' It adds a professional tone to your writing.

No 'e' in completion

Remember to drop the 'e' from 'complete' before adding '-ion.' Many people mistakenly write 'compleation.' Just think: 'Complete' ends in 'e', but 'Completion' ends in 'ion'. The 'e' has to go to make room for the new ending!

Stress the 'PLE'

The stress is on the second syllable: com-PLE-tion. If you stress the first syllable, it might be hard for native speakers to understand you. Practice saying it slowly and emphasizing the middle part of the word.

Completion Rates

In education and data analysis, 'completion rates' are very important. They measure what percentage of people finish a program. If you are reading reports or news about schools, you will see this term often. It's a key metric for success.

The Last Piece

Visualize a jigsaw puzzle. 'Completion' is the act of putting that very last piece into the hole. That feeling of satisfaction when the whole picture is finally visible is the essence of the word 'completion.' Use this image to remember it.

Memorize It

Mnemonic

Think of a 'COM-plete' 'P-uzzle' 'L-ast' 'E-lement' 'T-o' 'I-nstall' 'O-n' 'N-ow'. Completion is when you put that last piece in!

Visual Association

Imagine a circle that is almost closed, with one small gap. 'Completion' is the act of drawing that final line to make the circle perfect and whole.

Word Web

Finish Whole End Goal Process Project Achievement Final

Challenge

Try to use 'completion' in three different ways today: once about a small task, once about a long-term goal, and once using the phrase 'upon completion of'.

Word Origin

The word 'completion' comes from the Latin 'completio,' which is derived from the verb 'complere.' The prefix 'com-' means 'thoroughly' or 'together,' and 'plere' means 'to fill.' Therefore, the original sense of the word was 'to fill up thoroughly.' It entered Middle English through the Old French word 'completion.'

Original meaning: The act of filling up or making full.

It belongs to the Indo-European language family, specifically the Italic branch through Latin.

Cultural Context

No specific sensitivities, but be aware that 'completion' in a medical context (like 'completion of life') can be a sensitive way to discuss death.

In English-speaking business culture, 'completion' is highly valued as a sign of efficiency. 'Getting things across the finish line' is a common metaphor for completion.

The Human Genome Project completion (2003). The completion of the Transcontinental Railroad in the US (1869). The completion of Gaudi's Sagrada Familia (still ongoing, a famous example of non-completion).

Practice in Real Life

Real-World Contexts

Construction and Engineering

  • Substantial completion
  • Completion date
  • Certificate of completion
  • Near completion

Education and Training

  • Course completion
  • Completion rate
  • Certificate of completion
  • Degree completion

Business and Finance

  • Completion of the merger
  • Completion of the audit
  • Transaction completion
  • Project completion

Technology and Software

  • Auto-completion
  • Download completion
  • Installation completion
  • Percentage of completion

Legal and Real Estate

  • Completion statement
  • Date of completion
  • Subject to completion
  • Non-completion penalties

Conversation Starters

"What is the estimated completion date for your current project?"

"How do you feel when you finally reach the completion of a long task?"

"Do you use auto-completion on your phone, or do you find it annoying?"

"What was the most difficult completion you've ever achieved in your life?"

"Is the completion of a degree more important than the knowledge gained?"

Journal Prompts

Reflect on a time when the completion of a goal brought you unexpected feelings. Was it relief, sadness, or joy?

Describe a project that is currently near completion. What are the final steps you need to take?

How does the concept of 'completion' apply to your personal relationships or self-growth?

Write about a time you failed to reach the completion of a task. What did you learn from that experience?

If you could fast-forward to the completion of one major life goal, which one would it be and why?

Frequently Asked Questions

10 questions

Yes, 'completion' is generally more formal than 'finishing.' It is the preferred term in business, law, and academic writing. For example, you would use 'completion' in a contract or a formal report, while you might use 'finishing' when talking to a friend about your homework.

The difference is subtle but important. 'Completion' is the act of finishing a process (e.g., the completion of a project). 'Completeness' is the state of having all the parts that are needed (e.g., the completeness of a list). You complete a task to achieve completion, and you check a list to ensure its completeness.

While 'at the completion of' is sometimes used, 'upon completion of' is much more common and sounds more natural in formal English. For example, 'Upon completion of the course, you will receive a certificate' is a standard way to express this idea.

This is a technical term used in construction and law. It means that a project is finished enough to be used for its intended purpose, even if there are still some small, minor tasks to be finished. It is a major milestone that often triggers payments.

In American football, a 'completion' is a successful forward pass that is caught by a receiver. It is a key statistic for quarterbacks. In other sports, you might hear about 'completing a play' or 'completing a pass,' but 'completion' as a noun is most common in football.

No, 'compleation' is incorrect. The correct spelling is 'completion.' It follows the pattern of many English nouns derived from verbs ending in '-ete' (like 'delete' to 'deletion'), where the 'e' is dropped before adding '-ion.'

Common adjectives include 'successful,' 'timely,' 'satisfactory,' 'full,' 'partial,' 'final,' and 'imminent.' These help describe the quality or the timing of the finishing process. For example, 'We are happy with the timely completion of the repairs.'

Yes, 'completions' can be plural, but it is mostly used in specific contexts like sports (e.g., 'The quarterback had 25 completions in the game') or when referring to the finishing of multiple distinct items (e.g., 'We are tracking the completions of all 50 sub-projects').

Auto-completion is a software feature that predicts the rest of a word or sentence as you type it. It is common in search engines, messaging apps, and code editors. It helps users type faster and reduces errors by suggesting the most likely completion.

It is an official document given to someone who has finished a specific training program, short course, or workshop. It proves that the person has met all the requirements of the course, though it is usually less formal than a university degree.

Test Yourself 200 questions

writing

Write a sentence using 'upon completion of' in a professional context.

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writing

Describe a project you are currently working on and its expected completion date.

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writing

Explain the difference between 'completion' and 'conclusion' in your own words.

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writing

Write a short email to a manager giving a status update using the phrase 'near completion'.

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writing

How do you feel when you reach the completion of a major goal? Describe the emotions.

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writing

Use the word 'completion' in a sentence about a scientific discovery.

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writing

Write a sentence about a 'certificate of completion' you have earned or want to earn.

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writing

Describe a time when a project's completion was delayed. What happened?

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writing

Write a formal sentence about a merger using the word 'completion'.

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writing

Use 'completion' in a sentence about a sports event.

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writing

Explain why 'completion' is important in a legal contract.

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writing

Write a sentence about 'auto-completion' and how it affects your typing.

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writing

Describe the completion of a physical task, like building a piece of furniture.

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writing

Use the word 'non-completion' in a sentence about a project failure.

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writing

Write a sentence using 'timely completion' in a recommendation letter.

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writing

Describe a 'completion' ritual from your culture or one you know about.

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writing

Use 'completion' in a sentence about a psychological state.

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writing

Write a sentence about the 'completion of a cycle' in nature.

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writing

Describe the completion of a marathon or a long race.

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writing

Write a sentence about the 'completion of a transaction'.

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speaking

Pronounce the word 'completion' clearly, focusing on the stress on the second syllable.

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speaking

Tell a partner about a project you brought to completion recently.

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speaking

Use the phrase 'near completion' in a sentence about your work or studies.

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speaking

Explain the meaning of 'auto-completion' to someone who doesn't know the term.

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speaking

Discuss why 'timely completion' is important in your job.

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speaking

Describe the feeling of reaching the completion of a difficult task.

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speaking

Use 'upon completion of' to give a set of instructions.

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speaking

Ask a colleague about the completion date of a shared project.

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speaking

Discuss the 'completion rates' of a course you have taken.

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speaking

Use 'completion' in a sentence about a sports game you watched.

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speaking

Explain the difference between 'completion' and 'completeness' to a classmate.

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speaking

Describe the completion of a personal goal, like learning a new language.

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speaking

Use 'towards completion' to describe the progress of a long-term plan.

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speaking

Talk about a time you were 'awaiting completion' of something important.

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speaking

Discuss the importance of 'satisfactory completion' in a service job.

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speaking

Use 'completion' in a sentence about a historical event.

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speaking

Ask a question about the 'percentage of completion' of a task.

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speaking

Describe the 'completion' of a house sale from a buyer's perspective.

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speaking

Use 'completion' in a sentence about a creative project.

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speaking

Discuss the 'non-completion' of a task and its consequences.

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listening

Listen to the sentence: 'The completion of the project is expected by Friday.' What is the deadline?

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listening

Listen to the phrase: 'Upon completion of the course.' What happens after the course is finished?

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listening

Listen for the stress in 'completion'. Which syllable is emphasized?

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listening

Listen to the sentence: 'We are nearing completion of the renovations.' Are the renovations finished?

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listening

Listen to the term: 'Auto-completion'. In what context is this usually used?

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listening

Listen to the sentence: 'The completion rate has dropped this year.' Is this good news or bad news for a school?

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listening

Listen to the phrase: 'Certificate of completion'. What does this document prove?

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listening

Listen to the sentence: 'The completion of the merger was delayed.' What happened to the merger?

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listening

Listen to the term: 'Substantial completion'. Does this mean the project is 100% finished?

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listening

Listen to the sentence: 'The quarterback's completion was incredible.' What sport is being discussed?

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listening

Listen to the phrase: 'Date of completion'. What information does this provide?

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listening

Listen to the sentence: 'We are awaiting completion of the audit.' What is the speaker doing?

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listening

Listen to the term: 'Non-completion'. What does this mean in a contract?

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listening

Listen to the sentence: 'The completion of the cycle takes 24 hours.' How long is the process?

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listening

Listen to the phrase: 'Timely completion'. What does 'timely' mean here?

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/ 200 correct

Perfect score!

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