English Reference
adjective · noun

indefinite

adj. · n.
US /ˌɪnˈdɛfənət/ UK /ɪndˈɛfɪnət/ in·def·i·nite

  1. 01 B2 Upper Intermediate

    adj.lasting for an unknown amount of time, or until someone decides to stop it.

    adj.lasting for an unknown or unstated length of time; not having a fixed end point.

    Simple

    The workers went on an indefinite strike until their pay was increased.

    In context

    The government announced an indefinite suspension of the peace talks, citing a complete breakdown in communication between the two delegations.

  2. 02 B2 Upper Intermediate

    adj.not clear or not exact in meaning.

    adj.not clearly defined or determined; vague or ambiguous in nature.

    Simple

    She gave an indefinite answer because she wasn't sure what she wanted to do.

    In context

    The boundaries of the new district remained indefinite, leading to several legal disputes between neighbouring municipalities.

  3. 03 B2 Upper Intermediate Technical Law

    adj.used to describe words like 'a', 'an', or 'some' that do not point to one specific person or thing.

    adj.designating an unidentified or non-specific person, thing, or quantity.

    Simple

    In the sentence 'I saw a cat', 'a' is an indefinite article.

    In context

    The student struggled to distinguish between definite and indefinite pronouns when translating complex sentences from their native language.

    Usage

    Commonly used in the terms 'indefinite article' or 'indefinite pronoun'.

    non specific
  4. 04 C2 Proficiency Technical Math

    adj.used in math to describe a calculation that does not have specific start and end numbers.

    adj.relating to an integral without specified limits of integration.

    Simple

    The teacher asked the class to solve an indefinite integral for homework.

    In context

    The calculus exam required students to derive several indefinite integrals before moving on to applied physics problems.

  5. 05 C2 Proficiency TechnicalFormal Science

    n.a word that does not refer to a specific person or thing.

    n.a linguistic element, such as a pronoun or article, that does not specify a particular referent.

    Simple

    Words like 'anybody' and 'someone' are examples of indefinites.

    In context

    The linguist argued that the use of indefinites in the witness's testimony suggested a lack of certainty regarding the suspect's identity.

These include many carers who came to the UK to fill vacancies after the Covid pandemic, and were told they could apply for indefinite leave to remain after five years.

The Guardian· 10 Sept 2026

From Late Latin indēfīnītus. Morphologically in- + definite.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin la-lat indēfīnītus
Level B2 · Upper Intermediate
Frequency Frequent
Updated