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self-deception

[self-di-sep-shuh n, self-]
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noun
  1. the act or fact of deceiving oneself.
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Origin of self-deception

First recorded in 1670–80
Also called self-de·ceit [self-di-seet, self-] /ˈsɛlf dɪˈsit, ˌsɛlf-/.
Related formsself-de·cep·tive, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for self-deceit

self-deception

self-deceit

noun
  1. the act or an instance of deceiving oneself, esp as to the true nature of one's feelings or motives
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Derived Formsself-deceptive, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for self-deceit

self-deception

n.

1670s, from self- + deception.

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Online Etymology Dictionary, © 2010 Douglas Harper