[ feyth-lis ]
/ ˈfeɪθ lɪs /


not adhering to allegiance, promises, vows, or duty: the faithless behavior of Benedict Arnold.
not trustworthy; unreliable.
without trust or belief.
being without religious faith.
(among Christians) bereft of Christian faith.

Origin of faithless

First recorded in 1250–1300, faithless is from the Middle English word faithles. See faith, -less

Related forms

faith·less·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for faithless

British Dictionary definitions for faithless


/ (ˈfeɪθlɪs) /


unreliable or treacherous
dishonest or disloyal
having no faith or trust
lacking faith, esp religious faith

Derived Forms

faithlessly, adverbfaithlessness, noun
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