expiration

[ek-spuh-rey-shuhn]
noun
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.
3.
Archaic. death.

Origin:
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

nonexpiration, noun
preexpiration, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
expiration (ˌɛkspɪˈreɪʃən)
 
n
1.  the finish of something; ending; expiry
2.  the act, process, or sound of breathing out
3.  rare a last breath; death

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

expiration
early 15c., "vapor, breath," from M.Fr. expiration, from L. expirationem (nom. expiratio), from expirare (see expire). Meaning "termination, end, close" is from 1560s.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

expiration ex·pi·ra·tion (ěk'spə-rā'shən)
n.
See exhalation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
expiration   (ěk'spə-rā'shən)  Pronunciation Key 
See exhalation.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Luckily, leafy greens that have almost reached the expiration point can still
  be used.
The base of the lung descends during inspiration and ascends during expiration.
Check on delivery, expiration dates, or other concerns.
But if it is important enough, companies will try to get around the
  inconvenience of an expiration date.
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