[ ek-spuh-rey-shuhn ]
See synonyms for expiration on Thesaurus.com
  1. a coming to an end; termination; close: the expiration of a contract.

  2. the act of expiring, or breathing out; emission of air from the lungs.

  1. Archaic. death.

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Origin of expiration

1375–1425; late Middle English expiracioun<Latin expīrātiōn- (stem of expīrātiō), equivalent to expīrāt(us) (past participle of ex(s)pīrāre to expire) + -iōn--ion

Other words from expiration

  • non·ex·pi·ra·tion, noun
  • pre·ex·pi·ra·tion, noun

Words Nearby expiration

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use expiration in a sentence

British Dictionary definitions for expiration


/ (ˌɛkspɪˈreɪʃən) /

  1. the finish of something; ending; expiry

  2. the act, process, or sound of breathing out

  1. rare a last breath; death

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

Scientific definitions for expiration


[ ĕk′spə-rāshən ]

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