expiration.
An act, process, or instance of expiring.
Meaning & usage
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.
crackles heard on expiration
An act, process, or instance of expiring. A single outward breath.
labored expirations
An act, process, or instance of expiring. Other similar release of volatile matter.
An act, process, or instance of expiring. The last emission of breath; thus, synonym of death.
An act, process, or instance of expiring. Any other (metaphorically comparable) cessation, extinction, or ending.
expiration date
An act, process, or instance of expiring. That which is produced by breathing out, as a sound.
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.