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Synonyms

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

Derived 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.

The complaint was filed on behalf of 14 deportees, some of whom are currently held in Equatorial Guinea under conditions "amounting to arbitrary and indefinite detention", according to the lawsuit, seen by AFP.

From Barron's • Jun. 5, 2026

But only a handful have instituted indefinite bans, and just four other towns have sent related matters to the ballot.

From Los Angeles Times • Jun. 2, 2026

Until recently, foreign nationals were only eligible to stand for election to Holyrood if they had indefinite leave to remain - an immigration status allowing them to live and work in the UK in perpetuity.

From BBC • May 13, 2026

“Stalled peace talks have raised the prospect of an indefinite disruption to oil supplies from the Persian Gulf,” analysts at ANZ said.

From The Wall Street Journal • Apr. 29, 2026

“Brilliant, really. Vegetable, protein, and yeast. An indefinite supply of food.”

From "The Last Cuentista" by Donna Barba Higuera

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