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See more synonyms for mythomania on Thesaurus.com
noun Psychiatry.
  1. lying or exaggerating to an abnormal degree.
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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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for mythomaniac


  1. psychiatry the tendency to lie, exaggerate, or relate incredible imaginary adventures as if they had really happened, occurring in some mental disorders
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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