defection

[dih-fek-shuhn]
noun
1.
desertion from allegiance, loyalty, duty, or the like; apostasy: His defection to East Germany was regarded as treasonable.
2.
failure; lack; loss: He was overcome by a sudden defection of courage.

Origin:
1535–45; < Latin dēfectiōn- (stem of dēfectiō), equivalent to dēfect(us) (see defect) + -iōn- -ion

nondefection, noun
redefection, noun


1. loyalty.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
defection (dɪˈfɛkʃən)
 
n
1.  the act or an instance of defecting
2.  abandonment of duty, allegiance, principles, etc; backsliding
3.  defect another word for defect

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

defection
1540s, "action of failing;" 1550s, "action of deserting a party, leader, etc." from L. defectionem "desertion, revolt, failure," noun of action from deficere (see deficient). Originally of faith.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Some of this is self-correcting, as in the case of my own defection.
But it also led to a nearly complete defection of all the participants to the
  punishing group.
In the game, cooperation and defection result in differing payoffs depending on
  what the other participants do.
Because of her previous views, each swing of her pendulum was akin to a
  celebrated defection to an enemy camp.
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