mythomania

[mith-uh-mey-nee-uh]

noun Psychiatry.

lying or exaggerating to an abnormal degree.

Origin of mythomania

First recorded in 1905–10; mytho- + -mania
Related formsmyth·o·ma·ni·ac [mith-uh-mey-nee-ak] /ˌmɪθ əˈmeɪ niˌæk/, noun, adjective
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British Dictionary definitions for mythomaniac

mythomania

noun

psychiatry the tendency to lie, exaggerate, or relate incredible imaginary adventures as if they had really happened, occurring in some mental disorders
Derived Formsmythomaniac (ˌmɪθəʊˈmeɪnɪˌæk), noun, 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