C2 noun #2,000 most common 3 min read

definition

A definition is a statement that explains exactly what a word or thing means.

Explanation at your level:

A definition tells you what a word means. If you do not know a word, you look it up in a dictionary to find the definition. It helps you learn new words.

When you read a book, you might find a word you don't know. A definition explains that word in simple sentences. Teachers often use definitions to help students understand new topics.

A definition is a formal explanation of a word. In school, you might be asked to write a definition for a specific term. It is important to be clear so that other people understand your ideas correctly.

Beyond just explaining words, definition can describe how clear an image is. For example, a high-definition photo shows many small details. In academic writing, providing a clear definition is essential for a strong argument.

The term definition is fundamental to academic discourse. It involves setting conceptual boundaries to ensure precision in communication. To 'defy definition' is to be so unique that no existing word can accurately capture the essence of the subject.

Etymologically, definition is rooted in the concept of setting boundaries (finis). In high-level intellectual inquiry, defining terms is the primary step in logical analysis. It distinguishes between nuanced concepts and prevents ambiguity in complex philosophical or technical debates.

Word in 30 Seconds

  • A definition explains a word's meaning.
  • It comes from the Latin for 'limit'.
  • It can also mean visual clarity.
  • It is a countable noun.

Think of a definition as a boundary marker for language. When we use words, we need to make sure we are on the same page, and a definition acts as the anchor that keeps our communication steady.

In an academic sense, it is the process of setting limits on what a concept includes and excludes. Without clear definitions, arguments would be impossible to resolve because everyone would be using the same words to mean different things.

Outside of text, you might hear this word used to describe visual clarity. When you buy a high-definition (HD) TV, the word 'definition' refers to how crisp and clear the image is. It is all about how well you can distinguish the edges of an object!

The word definition has a long journey through history. It comes from the Latin word definitio, which is derived from definire, meaning 'to limit' or 'to set bounds.'

The prefix de- means 'completely,' and finire relates to finis, which means 'end' or 'boundary.' So, historically, defining something meant literally putting a fence around it to say where it ends and something else begins.

It entered Middle English through Old French in the 14th century. Interestingly, the sense of 'visual sharpness' didn't appear until much later, in the 19th century, as scientists began using the term to describe the clarity of lenses in microscopes and telescopes.

You will most often encounter definition in formal or academic contexts. It is a staple of essays, textbooks, and legal documents where precision is non-negotiable.

Common collocations include 'provide a definition,' 'clear definition,' and 'by definition.' Using the phrase 'by definition' is a great way to show that something is true simply because of what a word means.

While it is a neutral word, it carries a slightly formal register. In casual conversation, people might just ask, 'What does that mean?' rather than 'Can you give me a definition?'

By definition: Used to state that something is true as a logical result of a word's meaning. Example: 'A square is, by definition, a rectangle with four equal sides.'

Defy definition: To be so strange or complex that it cannot be easily described. Example: 'The beauty of the sunset defied definition.'

Broad definition: A way of looking at a concept that includes many things. Example: 'He has a broad definition of what counts as a sport.'

Strict definition: A very narrow or exact way of interpreting something. Example: 'Under a strict definition, this isn't a crime.'

Working definition: A temporary definition used for a project. Example: 'Let's use this as a working definition until we finish our research.'

The word definition is a countable noun. You can have one definition or many definitions. It is usually preceded by articles like 'a,' 'an,' or 'the.'

Pronunciation is straightforward but requires care with the stress. In both British and American English, the primary stress is on the third syllable: def-i-NISH-un. The IPA is /ˌdef.ɪˈnɪʃ.ən/.

Rhyming words include 'partition,' 'ambition,' 'tradition,' 'condition,' and 'ignition.' Notice how they all share that distinct '-ition' suffix, which is a common pattern for nouns describing an action or state.

Fun Fact

The word is related to 'finite', meaning having an end.

Pronunciation Guide

UK /ˌdef.ɪˈnɪʃ.ən/

Crisp 'def' sound, clear 'ish' syllable.

US /ˌdef.əˈnɪʃ.ən/

Slightly more relaxed middle vowel.

Common Errors

  • Misplacing the stress
  • Pronouncing the 'i' as 'e'
  • Slurring the 'tion' ending

Rhymes With

ambition tradition condition partition ignition

Difficulty Rating

Reading 2/5

Common word

Writing 2/5

Standard usage

Speaking 2/5

Standard usage

Listening 2/5

Standard usage

What to Learn Next

Prerequisites

word meaning book

Learn Next

definitive ambiguity terminology

Advanced

conceptualization delineation

Grammar to Know

Countable Nouns

A definition

Suffix -tion

Definition

Article Usage

The definition

Examples by Level

1

What is the definition of this word?

What means this word?

Question structure

2

I read the definition.

I read the meaning.

Past tense

3

The definition is clear.

The meaning is easy.

Adjective usage

4

Look for the definition.

Find the meaning.

Imperative

5

This is a good definition.

This is a nice meaning.

Demonstrative

6

Write the definition down.

Put the meaning on paper.

Phrasal verb

7

The dictionary has the definition.

The book has the meaning.

Possessive

8

I learned a new definition.

I know a new meaning.

Article usage

1

The teacher asked for a definition.

2

I checked the definition online.

3

This word has a simple definition.

4

Can you give me a definition?

5

The definition is in the back of the book.

6

I need a better definition.

7

Her definition was very helpful.

8

The definition covers many things.

1

The professor provided a clear definition.

2

It is hard to find a definition for this feeling.

3

We need a working definition for our project.

4

The definition of success varies by person.

5

By definition, a triangle has three sides.

6

He struggled with the definition of the term.

7

The textbook includes a glossary of definitions.

8

That is a broad definition of the problem.

1

The image lacks definition in low light.

2

His actions defy definition.

3

We must agree on a definition before we start.

4

The definition of the law is quite strict.

5

She gave a precise definition of the issue.

6

The high definition screen is amazing.

7

A dictionary definition is not always enough.

8

The definition of marriage has evolved.

1

The author challenges the traditional definition of art.

2

His theory lacks a rigorous definition.

3

The definition of the term remains highly contested.

4

We need to refine our definition of the market.

5

The definition of the concept is multifaceted.

6

She provided a comprehensive definition of the phenomenon.

7

The definition of the role is quite ambiguous.

8

The definition of the boundary is crucial.

1

The philosophical definition of consciousness is elusive.

2

His work defies conventional definition.

3

The definition of the term is historically contingent.

4

We must avoid a circular definition in our logic.

5

The definition of the parameters is essential.

6

The definition of the term has been expanded.

7

A precise definition is the cornerstone of the argument.

8

The definition of the category is inherently unstable.

Antonyms

ambiguity obscurity vagueness

Common Collocations

clear definition
dictionary definition
by definition
provide a definition
broad definition
strict definition
high definition
lack of definition
working definition
formal definition

Idioms & Expressions

"by definition"

naturally or logically

A hero is, by definition, brave.

neutral

"defy definition"

impossible to describe

Her talent defies definition.

literary

"a matter of definition"

it depends on how you define it

It is just a matter of definition.

neutral

"broad definition"

a wide-reaching interpretation

He has a broad definition of family.

neutral

"strict definition"

a narrow interpretation

By a strict definition, this is illegal.

formal

"working definition"

temporary understanding

Let's keep this as a working definition.

academic

Easily Confused

definition vs definite

Similar spelling

Adjective vs Noun

That is a definite plan vs That is a good definition.

definition vs define

Root word

Verb vs Noun

Define the term vs The definition is clear.

definition vs meaning

Synonym

Register

What is the meaning? vs What is the definition?

definition vs description

Similar function

Detail vs Boundary

A description of the scene vs A definition of the word.

Sentence Patterns

A2

The definition of [noun] is...

The definition of love is complex.

B1

By definition, [subject] is...

By definition, he is a leader.

B1

Provide a definition for...

Please provide a definition for this.

C1

It defies definition.

The situation defies definition.

B2

A strict definition of...

A strict definition of the law is needed.

Word Family

Nouns

definition the act of defining
definability the quality of being definable

Verbs

define to state the meaning of

Adjectives

definitive final and conclusive
definable able to be defined

Related

definite adjective form meaning certain

How to Use It

frequency

8

Formality Scale

academic neutral casual

Common Mistakes

Using 'define' as a noun definition
Define is the verb; definition is the noun.
Confusing with 'definite' definition
Definite is an adjective meaning certain.
Forgetting the article the definition
It is a countable noun.
Misspelling as 'defenition' definition
The middle vowel is an 'i'.
Using 'definition' for 'meaning' in every context context-dependent
Sometimes 'meaning' is more natural.

Tips

💡

Memory Palace Trick

Imagine a dictionary that is a giant box with fences.

💡

When Native Speakers Use It

Used when clarifying arguments.

🌍

Cultural Insight

Academic culture values precise definitions.

💡

Grammar Shortcut

Noun ends in -tion.

💡

Say It Right

Stress the third syllable.

💡

Don't Make This Mistake

Don't use define as a noun.

💡

Did You Know?

Related to the word 'finite'.

💡

Study Smart

Use it in sentences about your subjects.

💡

Academic Tip

Always define technical terms early.

💡

Word Web

Link to 'boundary' and 'limit'.

Memorize It

Mnemonic

DE-FIN-ITION: To FINish the meaning.

Visual Association

A fence around a word.

Word Web

meaning clarity boundary dictionary

Challenge

Define three objects in your room.

Word Origin

Latin

Original meaning: To limit or set boundaries

Cultural Context

None

Common in academic and legal settings.

The Oxford English Dictionary High Definition (HD) technology

Practice in Real Life

Real-World Contexts

At school

  • What is the definition?
  • Check the definition.
  • Write the definition.

At work

  • Let's agree on a definition.
  • Our working definition is...
  • That's outside the definition.

Watching TV

  • High definition
  • Standard definition
  • Change the definition.

Debating

  • By definition
  • That's a broad definition.
  • Let's define our terms.

Conversation Starters

"What is your definition of success?"

"Can you define your favorite word?"

"Why are definitions important?"

"How does high definition change movies?"

"Do you prefer a broad or strict definition of friendship?"

Journal Prompts

Write your own definition of happiness.

Describe a time you misunderstood a definition.

Why do we need definitions in society?

How would you define your personality?

Frequently Asked Questions

8 questions

No, define is the verb.

D-E-F-I-N-I-T-I-O-N.

No, say 'give a definition'.

It means high image quality.

Yes, you can have many definitions.

Definitions.

Mostly, but definition is more formal.

To set exact parameters.

Test Yourself

fill blank A1

The ___ of the word is in the book.

Correct! Not quite. Correct answer: definition

We need a noun here.

multiple choice A2

Which means to explain a word?

Correct! Not quite. Correct answer: definition

Definition is the explanation.

true false B1

A definition is a verb.

Correct! Not quite. Correct answer: False

It is a noun.

match pairs B1

Word

Meaning

All matched!

Match idioms to meanings.

sentence order B2

Tap words below to build the sentence
Correct! Not quite. Correct answer:

Standard question order.

fill blank C1

His artistic style ___ definition.

Correct! Not quite. Correct answer: defies

Idiom 'defies definition'.

multiple choice C2

What is the root of definition?

Correct! Not quite. Correct answer: Latin

From Latin 'definire'.

true false B2

Definition can refer to image quality.

Correct! Not quite. Correct answer: True

Yes, high definition.

match pairs A2

Word

Meaning

All matched!

Grammar categories.

sentence order C1

Tap words below to build the sentence
Correct! Not quite. Correct answer:

Passive voice structure.

Score: /10

Related Content

Learn it in Context

More Language words

abbreviate

C1

To shorten a word, phrase, or text by omitting letters or using only the first letters of the constituent parts. This is primarily done to save space, increase efficiency, or adhere to specific formatting conventions in writing.

ablative

B2

A grammatical case used in certain languages, such as Latin, to indicate movement away from, the source, or the instrument of an action. In English, these meanings are typically expressed using prepositions like 'from', 'with', or 'by' rather than specific noun endings.

abphonure

C1

A technical term in linguistics and phonetics referring to the intentional or accidental distortion of speech sounds, leading to a loss of phonetic clarity or a shift in meaning. It is often used to describe the degradation of sound quality in specific acoustic environments or the stylistic blurring of words in poetry and song.

abregous

C1

To summarize or condense a complex argument, document, or process into its most essential components. This verb is typically used when the goal is to provide clarity or speed up decision-making without losing the core meaning.

abridge

C1

To shorten a piece of writing, such as a book, play, or speech, by omitting sections while maintaining the essential meaning. It can also refer to the act of reducing or curtailing rights, privileges, or authority.

accentuation

B2

The act of emphasizing something or making it more prominent and noticeable to the observer. It also refers to the placement of marks or stress on specific syllables in linguistics to indicate correct pronunciation.

acerbic

C1

Describes a style of speaking or writing that is sharp, biting, and forthright, often characterized by clever but cruel wit. It is typically used to critique someone or something in a way that is both intellectually sharp and emotionally harsh.

acrimonious

C1

Describes a speech, relationship, or atmosphere that is full of anger, bitterness, and resentment. It is typically used to characterize long-standing disputes or heated arguments where personal insults or harsh language are involved.

acronym

B2

A word formed from the initial letters of a name or phrase, which is pronounced as a single word rather than as individual letters. For example, NASA is an acronym for the National Aeronautics and Space Administration.

adage

C1

An adage is a short, traditional saying that expresses a general truth or a piece of advice based on common experience. It is often a well-known proverb that has gained credibility through long-term usage within a culture.

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