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Definition of cap

cap

/kæp/
cap

Plural:caps
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Past Simple:capped
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Past Participle:capped
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Present Participle:capping
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cap Lexical Profile

cap Game Scores & Validity

• noun

1

A soft, close-fitting head covering, typically without a brim but often featuring a front visor.

Example

"He pulled the baseball cap down over his eyes to block the bright afternoon sun."


2

A small lid or cover used to seal a container, such as a bottle, tube, or pen.

Example

"Make sure you screw the cap back onto the toothpaste tube so it doesn't dry out."


3

An officially imposed upper limit on spending, prices, interest rates, or other measurable activities.

Example

"The local government introduced a salary cap for public executives to manage the budget deficit."

Synonyms
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• verb

1

To place an upper limit on a quantifiable measure, such as prices, spending, or emissions.

Example

"The university decided to cap its annual tuition increases at three percent."


2

To put a lid, cover, or protective top on an object or container.

Example

"The lab technician carefully capped the test tube before placing it in the centrifuge."


3

To provide a fitting climax, conclusion, or finishing touch to an event or sequence.

Example

"She capped off an extraordinary season by winning the championship match in straight sets."

Synonyms
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Antonyms
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Word Nuance & Usage

In modern internet and youth slang (derived from African American Vernacular English), 'cap' is frequently used as a noun meaning 'a lie' or a verb meaning 'to lie', famously popularized in the phrase 'no cap' (meaning 'no lie' or 'for real').

• Rhymes for cap

Word Origin & Etymology

From Old English 'cæppe' (hood, head-covering), which derives from Late Latin 'cappa' (a cape, hooded cloak). The figurative sense of an 'upper limit' emerged in the mid-20th century.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Cap. In Wordmom Dictionary. Retrieved Oct 15, 2026, from https://wordmom.com/dictionary/cap
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