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expiration.

An act, process, or instance of expiring.

10 characters4 syllables approx.English language

Meaning & usage

noun/ˌɛk.spəˈɹeɪ̯.ʃən/Received-Pronunciation[ˌɛk.spəˈɹeɪ̯.ʃən] ~ [ˌɛk.spəˈɹeɪ̯.ʃn̩]Received-Pronunciation/ˌɛk.spɚˈeɪ̯.ʃən/General-American[ˌɛk.spɚˈeɪ̯.ʃən] ~ [ˌɛk.spɹ̩ˈeɪ̯.ʃn̩]General-American
  1. An act, process, or instance of expiring. The act or process of breathing out, or forcing air from the lungs through the nose or mouth.

    uncountable
    crackles heard on expiration
  2. An act, process, or instance of expiring. A single outward breath.

    countable
    labored expirations
  3. An act, process, or instance of expiring. Other similar release of volatile matter.

    countable · uncountable
  4. An act, process, or instance of expiring. The last emission of breath; thus, synonym of death.

    countable · euphemistic · uncountable
  5. An act, process, or instance of expiring. Any other (metaphorically comparable) cessation, extinction, or ending.

    countable · uncountable
    expiration date
  6. An act, process, or instance of expiring. That which is produced by breathing out, as a sound.

    countable · uncountable
Where this word comes from

From Middle English expiracioun, exspiracioun (“vapor, breath”), from Latin expīrātiōnem, exspīrātiōnem, accusative singular of expīrātiō, exspīrātiō. By surface analysis, expire + -ation.

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.