define

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define

  • /dɪˈfaɪn/

Rhymes with -aɪn

Where it comes from

From Middle English definen, from Old French definer, variant of definir, from Latin dēfīniō (“limit, settle, define”), from dē + fīniō (“set a limit, bound, end”).

verb defines · defining · defined

  1. To determine with precision; to mark out with distinctness; to ascertain or exhibit clearly. the defining power of an optical instrument
  2. obsolete To settle, decide (an argument etc.). These warlike Champions, all in armour shine, / Assembled were in field the chalenge to define.
  3. To express the essential nature of something. I define myself as a techno-anarchist.
  4. To state the meaning of a word, phrase, sign, or symbol. The textbook defined speed as velocity divided by time.
  5. To describe, explain, or make definite and clear; used to request the listener or other person to elaborate or explain more clearly his or her intended meaning of a word or expression. Person 1: Is she good at math? Person 2: Define "good." If you mean if she is faster than the average middle schooler at multiplication, then yes. If you mean if she is able to do multivariable calculus, then no.
  6. To demark sharply the outlines or limits of an area or concept. to define the legal boundaries of a property
  7. To establish the referent of a term or notation.

noun defines

  1. A kind of macro in source code that replaces one text string with another wherever it occurs. From the computer programming perspective, Java looks like C and C++ while discarding the overwhelming complexities of those languages, such as typedefs, defines, preprocessor, unions, pointers, and multiple inheritance.

Thesaurus

Closest in meaning: specify, delimitate, delimit, delineate, specifying, definitional, explain, clarifying, devising, indicate, identifying, create, shape, identify, identification, designate

Translations

Every language

verb to determine

Españoldeterminar, definir, definirse
Portuguêsdefinir
Françaisdéterminer
Deutschbestimmen
Italianodefinire, determinare
Русскийопределя́ть opredeljátʹ, определи́ть opredelítʹ
עבריתהגדיר higdír

verb express the essential nature of

Españolaclarar, definir
中文界定 jièdìng
Portuguêsdefinir
Italianodefinire

verb state meaning of

Españoldefinir
한국어정의하다 jeong'uihada
日本語定義する teigi suru
中文定义 dìngyì
Portuguêsdefinir
Françaisdéfinir
Deutschdefinieren
Italianodefinire
Românădefini
Русскийопи́сывать opísyvatʹ, описа́ть opisátʹ

verb describe, explain, make definite and clear

Españoldescribir, definir
Deutschdefinieren
Italianodefinire, descrivere
Русскийопи́сывать opísyvatʹ, описа́ть opisátʹ

verb demark the limits of

Españoldelimitar, demarcar, definir
Françaisdéfinir
Русскийобознача́ть oboznačátʹ, обозна́чить oboznáčitʹ

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Cite this
MLA

"define." Wiktionary, via Micwyn, micwyn.com/word/define. Accessed 6 Nov. 2026.

APA

define. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/define

Chicago

"define." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/define.

BibTeX
@misc{define_2026,
  title = {define},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/define},
  urldate = {2026-11-06}
}