con·fir·ma·tion

[kon-fer-mey-shuhn]
noun
1.
the act of confirming.
2.
the state of being confirmed.
3.
something that confirms, as a corroborative statement or piece of evidence: His birth certificate served as confirmation of his citizenship.
4.
a rite administered to baptized persons, in some churches as a sacrament for confirming and strengthening the recipient in the Christian faith, in others as a rite without sacramental character by which the recipient is admitted to full communion with the church.
5.
a solemn ceremony among Reform and certain Conservative Jews that is held in the synagogue, usually on Shavuoth, to admit formally as adult members of the Jewish community Jewish boys and girls 14 to 16 years of age who have successfully completed a prescribed course of study in Judaism.

Origin:
1275–1325; Middle English < Latin confirmātiōn- stem of confirmātiō. See confirm, -ation

con·fir·ma·tion·al, adjective
non·con·fir·ma·tion, noun
pre·con·fir·ma·tion, noun
re·con·fir·ma·tion, noun
self-con·fir·ma·tion, noun
su·per·con·fir·ma·tion, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To confirmation
00:10
Confirmation is always a great word to know.
So is ninnyhammer. Does it mean:
a chattering or flighty, light-headed person.
a fool or simpleton; ninny.
Collins
World English Dictionary
confirmation (ˌkɒnfəˈmeɪʃən) [Click for IPA pronunciation guide]
 
n
1.  the act of confirming
2.  something that confirms; verification
3.  a rite in several Christian churches that confirms a baptized person in his or her faith and admits him or her to full participation in the church
4.  Compare hypothetico-deductive (in the philosophy of science) the relationship between an observation and the theory which it supposedly renders more probable

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

confirmation
c.1300, confyrmacyoun, the Church rite, from O.Fr. confirmation (13c.), from L. confirmationem, noun of action from confirmare (see confirm). Aa a legal action, from late 14c.; as "action of making sure," from c.1480.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Archaeopteryx was the first feathered dinosaur ever discovered and was a
  confirmation that birds had evolved from reptiles.
It also notifies astronomers of which newfound objects are in need of follow-up
  observations and confirmation.
Good, another confirmation of quantum mechanics and weak measurements both.
The confirmation kicked off an explosion in extrasolar planet hunting.
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