define
Americanverb (used with object)
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to state or set forth the meaning of (a word, phrase, etc.).
They disagreed on how to define “liberal.”
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to explain or identify the nature or essential qualities of; describe.
to define judicial functions.
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to fix or lay down clearly and definitely; specify distinctly.
to define one's responsibilities.
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to determine or fix the boundaries or extent of.
to define property with stakes.
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to make clear the outline or form of.
The roof was boldly defined against the sky.
verb (used without object)
verb
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to state precisely the meaning of (words, terms, etc)
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to describe the nature, properties, or essential qualities of
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to determine the boundary or extent of
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(often passive) to delineate the form or outline of
the shape of the tree was clearly defined by the light behind it
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to fix with precision; specify
Other Word Forms
- definability noun
- definable adjective
- definably adverb
- definement noun
- definer noun
- misdefine verb (used with object)
- nondefinability noun
- nondefinable adjective
- nondefinably adverb
- nondefined adjective
- nondefiner noun
- predefine verb (used with object)
- redefine verb (used with object)
- self-defined adjective
- semidefined adjective
- undefinable adjective
Etymology
Origin of define
First recorded in 1325–75; Middle English def(f)inen, from Anglo-French, Old French definer “to put an end to,” from Latin dēfīnīre ”to limit, define,“ equivalent to dē- “from, away from, out of” + fīnīre “to end”; de-, finish
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
A few months later, the organisation issued a new set of guidelines, reiterating that it was "not in a position to issue regulations that define eligibility criteria for every sport".
From BBC • Mar. 31, 2026
AI is supposed to define everybody’s future, but some people think that Apple has fallen behind in the AI race.
From Barron's • Mar. 31, 2026
“The first lease is not just a milestone, it will define the benchmark for every agreement that follows, and we intend to get it right,” Neugebauer wrote.
From MarketWatch • Mar. 30, 2026
His visionary management would define the organization in other ways.
From The Wall Street Journal • Mar. 28, 2026
It didn’t seem like there was any way to define myself other than by what was missing—my legs—and the strange extra I had: a nose made out of a toe.
From "Ugly" by Robert Hoge
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
