define

[ dih-fahyn ]

verb (used with object)

, de·fined, de·fin·ing.

1. to state or set forth the meaning of (a word, phrase, etc.):

   They disagreed on how to define “liberal.”

2. to explain or identify the nature or essential qualities of; describe:

   to define judicial functions.

3. to fix or lay down clearly and definitely; specify distinctly:

   to define one's responsibilities.

   Synonyms: enumerate, detail, describe, name, state

4. to determine or fix the boundaries or extent of:

   to define property with stakes.

5. to make clear the outline or form of:

   The roof was boldly defined against the sky.

verb (used without object)

, de·fined, de·fin·ing.

1. to set forth the meaning of a word, phrase, etc.; construct a definition.

define

/ dɪˈfaɪn /

verb

1. to state precisely the meaning of (words, terms, etc)
2. to describe the nature, properties, or essential qualities of
3. to determine the boundary or extent of
4. often passive to delineate the form or outline of

   the shape of the tree was clearly defined by the light behind it

5. to fix with precision; specify

Derived Forms

• deˈfinably, adverb
• deˈfinable, adjective
• deˈfiner, noun
• deˌfinaˈbility, noun

Other Words From

• de·fina·ble adjective
• de·fina·bili·ty noun
• de·fina·bly adverb
• de·finement noun
• de·finer noun
• misde·fine verb (used with object) misdefined misdefining
• nonde·fina·bili·ty noun
• nonde·fina·ble adjective
• nonde·fina·bly adverb
• nonde·fined adjective
• nonde·finer noun
• prede·fine verb (used with object) predefined predefining
• rede·fine verb (used with object) redefined redefining
• self-de·fined adjective
• semi·de·fined adjective
• unde·fina·ble adjective

Word History and Origins

Origin of define¹

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

Word History and Origins

Origin of define¹

C14: from Old French definer to determine, from Latin dēfīnīre to set bounds to, from fīnīre to finish

Example Sentences

Ms Riley's name became a rallying cry for conservatives as border security emerged as a defining issue in the White House race.

From BBC

A new theory, that explains how light and matter interact at the quantum level has enabled researchers to define for the first time the precise shape of a single photon.

From Science Daily

The new definition defines cerebral palsy as "the most common lifelong physical disability" people can face.

From Science Daily

Ecocide is defined by experts as a "wanton" act of destruction, carried out with "reckless disregard for damage which would be clearly excessive in relation to the social and economic benefits anticipated."

From Salon

Pushing away the slurry water with a bristled brush became a defining image.

From BBC

Related Words

• characterize
• construe
• decide
• delineate
• describe
• designate
• detail
• determine
• exemplify
• explain
• illustrate
• interpret
• prescribe
• represent
• specify
• spell out