Dictionary Home »
Dictionary Definitions » unfaithful
unfaithful
adjective
- failing to observe the terms of a vow, promise, understanding, etc., or false to allegiance or duty; faithless; disloyal
- not true, accurate, or reliable; untrustworthy
- engaging in sexual relations with someone other than one's spouse, lover, etc.; adulterous
- Archaic lacking good faith; dishonest
- Obsolete infidel
Related Forms:
- unfaithfully adverb
- unfaithfulness noun
See unfaithful in American Heritage Dictionary 4
Learn more about unfaithful