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indefinite

American  
[in-def-uh-nit] / ɪnˈdɛf ə nɪt /

adjective

  1. not definite; without fixed or specified limit; unlimited.

    an indefinite number.

    Synonyms:
    indeterminate, unspecified
    Antonyms:
    determinate
  2. not clearly defined or determined; not precise or exact.

    an indefinite boundary; an indefinite date in the future.

    Synonyms:
    uncertain, vague, confusing, indistinct, inexact, imprecise
    Antonyms:
    specific, clear, determinate
  3. Grammar.

    1. indefinite article.

    2. indefinite pronoun.

  4. Botany.

    1. very numerous or not easily counted, as stamens.

    2. (of an inflorescence) indeterminate.


indefinite British  
/ ɪnˈdɛfɪnɪt /

adjective

  1. not certain or determined; unsettled

  2. without exact limits; indeterminate

    an indefinite number

  3. vague, evasive, or unclear

  4. Also: indeterminatebotany

    1. too numerous to count

      indefinite stamens

    2. capable of continued growth at the tip of the stem, which does not terminate in a flower

      an indefinite inflorescence

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of indefinite

From the Latin word indēfīnītus, dating back to 1520–30. See in- 3, definite

Explanation

The adjective indefinite describes something that is vague or not clearly defined: “After injuring her knee in a riding accident, Gloria postponed her vacation for an indefinite period of time.” You’ve probably noticed that a big chunk of the word indefinite is made up of a familiar word, definite — which means “specific” or “clearly defined.” The two words have common origins in the Latin word definitus (“definite”), but indefinite’s in- prefix gives the word the opposite meaning — "not clearly defined". Indefinite, wonderfully vague and undefined, is your friend for those times when your plans are up in the air (“indefinite plans”) or you don’t want to be pinned down to any particular timeframe (“on indefinite hiatus”).

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Vocabulary lists containing indefinite

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.

See Examples For:

His title, “Enemy of the People,” dispenses with the indefinite article — a decision he chalked up to “Chekhovian impulses.”

From Los Angeles Times Aug. 26, 2026

Some may counter that Fedspeak isn’t meant to provide indefinite guidance.

From The Wall Street Journal Aug. 25, 2026

“They’re going to be spending cash for the indefinite future. The idea of free cash flow is just not part of the story,” Bill Birmingham, managing director at exchange-traded product provider Rex Shares, told MarketWatch.

From MarketWatch Aug. 3, 2026

NFL analyst Tony Romo has been placed on indefinite leave by CBS Sports and will be replaced in the booth by J.J.

From Los Angeles Times Jul. 31, 2026

If this is indeed the case, you have only to say the word and I will offer my services gratis for an indefinite period of time.

From "Nine Stories" by J. D. Salinger

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