- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for faithless
That this or that good woman could do this or that faithless or mean thing, was nothing to her!Weighed and Wanting
Now they tell you, and seem to show you, that he is faithless.Fair Margaret
H. Rider Haggard
Have I not, in the height of them, vowed revenge upon the faithless charmer?Clarissa, Volume 3 (of 9)
Where have you learned the disingenuous and faithless arts you employ?Imogen
Not once since she began to get better, had Phemy alluded to her faithless lover.Heather and Snow
- unreliable or treacherous
- dishonest or disloyal
- having no faith or trust
- lacking faith, esp religious faith
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 faithless
Online Etymology Dictionary, © 2010 Douglas Harper