[ uhn-feyth-fuhl ]
/ ʌnˈfeɪθ fəl /
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not faithful; false to duty, obligation, or promises; disloyal: Given how unfaithful the party has been to voters, it would be surprising if they won.
not sexually loyal to a spouse or lover; adulterous: She was concerned her husband would be unfaithful when he travelled.
not accurate or complete; inexact: The book was an unfaithful translation of the original.
Obsolete. without religious faith; unbelieving.
OTHER WORDS FOR unfaithful
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Origin of unfaithful
OTHER WORDS FROM unfaithfulun·faith·ful·ly, adverbun·faith·ful·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use unfaithful in a sentence
In all their unfaithfulness, their very existence as a separate people is a standing miracle, witnessing to the truth of prophecy.Separation and Service|James Hudson Taylor
May hung her head like one accused of gross unfaithfulness, with some show of reason.A Houseful of Girls|Sarah Tytler
I considered her as a person whose sole merit had lain in her innocence, and whose unfaithfulness robbed her of all her charms.Queens of the French Stage|H. Noel Williams
Most of the allusions are too slightly sketched to permit this; but one or two are like him in their unfaithfulness.A Letter on Shakspere's Authorship of The Two Noble Kinsmen|William Spalding
Do men and women who are living in secret unfaithfulness hold exalted ideals of sex?Sex=The Unknown Quantity|Ali Nomad
British Dictionary definitions for unfaithful
/ (ʌnˈfeɪθfʊl) /
not true to a promise, vow, etc
not true to a wife, husband, lover, etc, esp in having sexual intercourse with someone else
inaccurate; inexact; unreliable; untrustworthyunfaithful copy
obsolete not having religious faith; infidel
obsolete not upright; dishonest
Derived forms of unfaithfulunfaithfully, adverbunfaithfulness, 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