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unfaithful definition

un·faith·ful (-fāt̸h′fəl)

adjective

  1. failing to observe the terms of a vow, promise, understanding, etc., or false to allegiance or duty; faithless; disloyal
  2. not true, accurate, or reliable; untrustworthy
  3. engaging in sexual relations with someone other than one's spouse, lover, etc.; adulterous
  4. Archaic lacking good faith; dishonest
  5. Obsolete infidel

Related Forms:

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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