A seal is a protective barrier or an official stamp that guarantees security and authenticity.
Word in 30 Seconds
- A device used to close or secure an opening.
- Indicates a product is new and unopened.
- An official mark used to authenticate documents.
Overview
The word 'seal' is a versatile noun in English, functioning both as a physical barrier and a symbolic mark of authenticity. At its most basic level, a seal is something that closes an opening securely. This can be a wax seal on an envelope, a plastic film on a medicine bottle, or a rubber gasket in a pipe. Usage Patterns: When used in the context of products, it implies security and freshness. If a seal is 'broken,' it indicates that the item has been tampered with or previously used. In a more formal or historical context, a seal refers to an impression made in wax or embossed on paper to prove the origin or official nature of a document. Common Contexts: You will frequently encounter this word in retail settings, such as 'safety seal' on food or cosmetics. It is also common in legal or administrative environments, where an 'official seal' validates a certificate or contract. Additionally, in mechanical contexts, a seal is a critical component that prevents oil or water from leaking out of an engine or plumbing system. Similar Words Comparison: While 'seal' implies a tight, often permanent closure, 'lid' refers specifically to a removable cover for a container. 'Sticker' is a more general term for a piece of adhesive paper, whereas a 'seal' specifically suggests that the object has been closed for security or verification purposes. Understanding the nuance of 'seal' is essential for daily interactions, whether you are checking a product at the store or signing an important legal document.
Examples
Check the seal before you buy the milk.
everydayCheck the seal before you buy the milk.
The treaty was confirmed by the official seal of the state.
formalThe treaty was confirmed by the official seal of the state.
I couldn't open the jar because the seal was too tight.
informalI couldn't open the jar because the seal was too tight.
The researchers applied a hermetic seal to the container to prevent contamination.
academicThe researchers applied a hermetic seal to the container to prevent contamination.
Common Collocations
Common Phrases
seal of approval
official or public support
hermetic seal
an airtight closure
broken seal
evidence of tampering
Often Confused With
A lid is a removable cover for a container. A seal is usually a film or adhesive that must be broken to access the contents.
A stamp is usually ink on paper, whereas a seal is often an embossed impression or a physical barrier.
Grammar Patterns
How to Use It
Usage Notes
The word is neutral in register but takes on a formal tone when referring to government documents. In everyday life, it is commonly used to describe product safety. Ensure you distinguish it from the animal 'seal' based on the surrounding sentence context.
Common Mistakes
Learners sometimes use 'seal' to mean any kind of cover, but it specifically implies a secure, often tamper-evident closure. Avoid using 'seal' when you simply mean a regular lid that can be opened and closed repeatedly. Remember that 'seal' is both a noun and a verb, which can sometimes cause confusion in sentence structure.
Tips
Check the seal on groceries
Always inspect the safety seal on jars and bottles before purchasing. If it looks damaged, choose a different item.
Don't confuse with the animal
The word 'seal' also refers to a marine mammal. Context will usually tell you which meaning is intended.
Official seals in government
Many countries use a national seal to represent their government. These are often found on passports and official state documents.
Word Origin
The word comes from the Old French 'seel', derived from the Latin 'sigillum', meaning a little sign or mark. It has been used in English since the 13th century to refer to both wax impressions and physical closures.
Cultural Context
Seals have been used for thousands of years to prove the authenticity of documents. In many cultures, a signature is now used instead of a wax seal, but the concept remains vital in legal and international relations.
Memory Tip
Think of a 'seal' as a 'sentry' that stays at the door of a package to guard it. If the sentry is 'broken,' the package is no longer safe.
Frequently Asked Questions
4 questionsIt means the protective barrier has been opened or tampered with. You should be cautious when buying products with broken seals.
Yes, 'to seal' means to close something tightly. For example, you can seal an envelope with glue.
No, while historical seals were made of wax, modern seals are often made of plastic, metal, or rubber. The material depends on the purpose of the seal.
A security seal is a device designed to show if a package has been opened. It is commonly used in shipping to prevent theft.
Test Yourself
Please check that the plastic ___ on the bottle is intact before drinking.
A plastic seal is the standard term for the safety barrier on a bottle.
The document was authenticated with the royal seal.
In legal and historical contexts, a seal is a mark of authority.
the / broken / was / seal / package / the / of
The correct structure follows Subject-Verb-Adjective order.
Score: /3
Summary
A seal is a protective barrier or an official stamp that guarantees security and authenticity.
- A device used to close or secure an opening.
- Indicates a product is new and unopened.
- An official mark used to authenticate documents.
Check the seal on groceries
Always inspect the safety seal on jars and bottles before purchasing. If it looks damaged, choose a different item.
Don't confuse with the animal
The word 'seal' also refers to a marine mammal. Context will usually tell you which meaning is intended.
Official seals in government
Many countries use a national seal to represent their government. These are often found on passports and official state documents.
Examples
4 of 4Check the seal before you buy the milk.
Check the seal before you buy the milk.
The treaty was confirmed by the official seal of the state.
The treaty was confirmed by the official seal of the state.
I couldn't open the jar because the seal was too tight.
I couldn't open the jar because the seal was too tight.
The researchers applied a hermetic seal to the container to prevent contamination.
The researchers applied a hermetic seal to the container to prevent contamination.
Quick Quiz
Do not buy this juice if the ______ is broken.
Correct!
The correct answer is: seal
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Learn it in Context
This Word in Other Languages
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