Definition of "unfaithful" []

• Not adhering to promises, obligations, or allegiances; disloyal. See Synonyms at faithless. (adjective)
• Not true or constant to one's sexual partner. (adjective)
• Not true to one's spouse; guilty of adultery. (adjective)
• Not justly representing or reflecting the original; inaccurate. (adjective)
• Obsolete Deficient in or lacking religious faith; unbelieving. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Of course the term unfaithful isn't quite accurate."
• "This, however, should be said for the negroes in such a case: they call their unfaithful treasurer "a thief," they do not say "defaulter.""
• "We don't like politicians who have been unfaithful, and the last few years have brought a spate of them: Schwarzenegger, Sanford, Edwards, Spitzer, Craig, Giuliani, McGreevey and, depending on your definition of unfaithful, Weiner."