WORD ORIGIN noun a coming to an end; termination; close: the expiration of a contract. the act of expiring, or breathing out; emission of air from the lungs. Origin of expiration 1375–1425; late Middle English expiracioun
), equivalent to
) (past participle of
-iōn- -ion Related forms non·ex·pi·ra·tion, noun pre·ex·pi·ra·tion, noun
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for non-expiration noun the finish of something; ending; expiry the act, process, or sound of breathing out rare a last breath; death
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Word Origin and History for non-expiration n.
early 15c., "vapor, breath," from Middle French
expiration, from Latin expirationem/ exspirationem (nominative expiratio/ exspiratio), noun of action from past participle stem of expirare/ exspirare (see expire). Meaning "termination, end, close" is from 1560s.
Online Etymology Dictionary, © 2010 Douglas Harper
non-expiration in Medicine expiration [ĕk′spə-rā ′shən]
The American Heritage® Stedman's Medical Dictionary
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non-expiration in Science
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