Source : Webster's Revised Unabridged Dictionary (1913)

Falseness \False"ness\, n.
   The state of being false; contrariety to the fact;
   inaccuracy; want of integrity or uprightness; double dealing;
   unfaithfulness; treachery; perfidy; as, the falseness of a
   report, a drawing, or a singer's notes; the falseness of a
   man, or of his word.

Source : WordNet®

falseness
     n 1: the state of being false or untrue; "argument could not
          determine its truth or falsity" [syn: {falsity}] [ant: {truth}]
     2: unfaithfulness by virtue of being unreliable or treacherous
        [syn: {faithlessness}, {fickleness}, {inconstancy}]
     3: the quality of not being open or truthful; deceitful or
        hypocritical [syn: {insincerity}] [ant: {sincerity}]