Word Origin See more synonyms on Thesaurus.com verb (used without object), ex·pired, ex·pir·ing. to come to an end; terminate, as a contract, guarantee, or offer. to emit the last breath; die. to breathe out. to die out, as a fire. verb (used with object), ex·pired, ex·pir·ing. to breathe out; emit (air) from the lungs. . Archaic to give off, emit, or eject. Origin of expire 1375–1425; late Middle English
to breathe out, equivalent to
ex- ex- 1
Related forms ex·pir·er, noun ex·pir·ing·ly, adverb non·ex·pir·ing, adjective un·ex·pired, adjective un·ex·pir·ing, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for unexpiring (intr) to finish or run out; cease; come to an end to breathe out (air); exhale (intr) to die Derived Forms expirer, noun Word Origin
C15: from Old French
expirer, from Latin exspīrāre to breathe out, from spīrāre to breathe
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for unexpiring expire v.
c.1400, "to die," from Middle French
expirer (12c.) "expire, elapse," from Latin expirare/ exspirare "breathe out, breathe one's last, die," from ex- "out" (see ex-) + spirare "to breathe" (see spirit). "Die" is the older sense in English; that of "breathe out" is first attested 1580s. Of laws, patents, treaties, etc., mid-15c. Related: Expired; expiring.
Online Etymology Dictionary, © 2010 Douglas Harper
expire (ĭk-spīr ′) To breathe one's last breath; die. To exhale.
The American Heritage® Stedman's Medical Dictionary
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