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.
The use of two or more distinct allegations or answers, where one is sufficient.
In indictments, the union of two incompatible offenses.
Nothing so completely baffles one who is full of trick and duplicity himself, than straightforward and simple integrity in another. Charles Caleb Colton
A wartime Minister of Information is compelled, in the national interest, to such continuous acts of duplicity that even his natural hair must grow to resemble a wig. Claud Cockburn