Noah Webster's Dictionary 1. (n.) Double-dealing; deliberate deceptiveness; a twofold state. 2. (n.) Doubleness of heart or speech; insincerity; a sustained form of deception which consists in entertaining or pretending to entertain one of feelings, and acting as if influenced by another; bad faith. 3. (n.) The use of two or more distinct allegations or answers, where one is sufficient. 4. (n.) In indictments, the union of two incompatible offenses.

Multi-Version Concordance Duplicity (1 Occurrence) Proverbs 11:3 The righteousness of the upright will be their guide, but the twisted ways of the false will be their destruction. (See NIV)