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.
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
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
Online automated investment services, known as robo advisers, can select investments for you once you define your risk comfort level.
From MarketWatch • Mar. 30, 2026
“All of us will be challenged to be able to define what real creativity actually means and how we can protect the role of creative artists,” Grainge said, “human beings with original ideas and soul.”
From The Wall Street Journal • Mar. 28, 2026
If you don’t get out there and define yourself, you’ll be quickly and inaccurately defined by others.
From "Becoming" by Michelle Obama
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.
