expire

[ik-spahyuhr]
verb (used without object), expired, expiring.
1.
to come to an end; terminate, as a contract, guarantee, or offer.
2.
to emit the last breath; die.
3.
to breathe out.
4.
to die out, as a fire.
verb (used with object), expired, expiring.
5.
to breathe out; emit (air) from the lungs.
6.
Archaic. to give off, emit, or eject.

Origin:
1375–1425; late Middle English < Latin ex(s)pīrāre to breathe out, equivalent to ex- ex-1 + spīrāre to breathe

expirer, noun
expiringly, adverb
nonexpiring, adjective
unexpired, adjective
unexpiring, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
expire (ɪkˈspaɪə)
 
vb
1.  (intr) to finish or run out; cease; come to an end
2.  to breathe out (air); exhale
3.  (intr) to die
 
[C15: from Old French expirer, from Latin exspīrāre to breathe out, from spīrāre to breathe]
 
ex'pirer
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

expire
early 15c., from M.Fr. expirer, from L. expirare "breathe out, breathe one's last, die," from ex- "out" + 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., late 15c. Related: Expired; expiring.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

expire ex·pire (ĭk-spīr')
v. ex·pired, ex·pir·ing, ex·pires

  1. To breathe one's last breath; die.

  2. To exhale.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
When drugs do finally expire, some gradually get weaker and eventually become
  inert.
As a good first step to regaining some measure of economic stability, they
  should be allowed to expire.
They can be fired tomorrow or whenever their contracts expire.
As the globe warms, many temperature-sensitive species have to adapt or expire.
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