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.

unfaithfulness by virtue of being unreliable or treacherous

the state of being false or untrue; "argument could not determine its truth or falsity"

the quality of not being open or truthful; deceitful or hypocritical