The meaning of EXPIRATION is the last emission of breath : death. How to use expiration in a sentence.

EXPIRATION definition: 1. the situation in which something that lasts for a fixed length of time comes to an end or stops…. Learn more.

EXPIRATION definition: a coming to an end; termination; close. See examples of expiration used in a sentence.

ex•pi•ra•tion (ˌɛk spəˈreɪ ʃən) n. 1. termination; close: the expiration of a contract. 2. the act of breathing out air from the lungs.

Definition of expiration noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

There are nine meanings listed in OED's entry for the noun expiration, six of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

WordReference Random House Learner's Dictionary of American English © 2025 ex•pir•a•tion /ɛkspəˈreɪʃən/ n. [uncountable] Physiology a coming to an end; termination: the expiration of a …

Expiration refers to the conclusion or ending of a period of time, often associated with contracts, licenses, or the freshness of perishable items.

Expiration refers to the end of a period of validity or usefulness. This could relate to time-sensitive items such as food, contracts, legal documents, licenses, medicines, or promotional offers, where …

Jan 31, 2026 · Noun expiration (countable and uncountable, plural expirations) An act, process , or instance of expiring. (uncountable) The act or process of breathing out, or forcing air from the lungs …