Source : Webster's Revised Unabridged Dictionary (1913)

Falsehood \False"hood\, n. [False + -hood]
   1. Want of truth or accuracy; an untrue assertion or
      representation; error; misrepresentation; falsity.

            Though it be a lie in the clock, it is but a
            falsehood in the hand of the dial when pointing at a
            wrong hour, if rightly following the direction of
            the wheel which moveth it.            --Fuller.

   2. A deliberate intentional assertion of what is known to be
      untrue; a departure from moral integrity; a lie.

   3. Treachery; deceit; perfidy; unfaithfulness.

            Betrayed by falsehood of his guard.   --Shak.

   4. A counterfeit; a false appearance; an imposture.

            For his molten image is falsehood.    --Jer. x. 14.

            No falsehood can endure Touch of celestial temper.
                                                  --Milton.

   Syn: Falsity; lie; untruth; fiction; fabrication. See
        {Falsity}.

Source : WordNet®

falsehood
     n 1: a false statement [syn: {falsity}, {untruth}, {false
          statement}] [ant: {truth}]
     2: the act of rendering something false as by fraudulent
        changes (of documents or measures etc.) or counterfeiting
        [syn: {falsification}]