Noah Webster's Dictionary 1. (v. t.) Dexterous in performing an action, so as to escape notice; nimble; skillful; cautious; shrewd; knowing; -- in a good sense. 2. (v. t.) Artfully cunning; secretly mischievous; wily. 3. (v. t.) Done with, and marked by, artful and dexterous secrecy; subtle; as, a sly trick. 4. (v. t.) Light or delicate; slight; thin. 5. (adv.) Slyly.

Multi-Version Concordance Sly (3 Occurrences) Matthew 26:4 They took counsel together that they might take Jesus by deceit, and kill him. (See NIV) Mark 14:1 It was now two days before the feast of the Passover and the unleavened bread, and the chief priests and the scribes sought how they might seize him by deception, and kill him. (See NIV) Proverbs 25:23 As the north wind gives birth to rain, so is an angry face caused by a tongue saying evil secretly. (See NIV)