sly, cunning, crafty, wily, tricky, foxy, artful, slick mean attaining or seeking to attain one's ends by guileful or devious means. sly implies furtiveness, lack of candor, and skill in concealing one's aims …

If you describe someone as sly, you disapprove of them because they keep their feelings or intentions hidden and are clever at deceiving people.

She thought that by being sly, she could fool people. A cat can be a very sly animal.

SLY definition: cunning or wily. See examples of sly used in a sentence.

Define sly. sly synonyms, sly pronunciation, sly translation, English dictionary definition of sly. adj. sli·er , sli·est also sly·er or sly·est 1. Clever or cunning, especially in the practice of deceit. 2. Stealthy or …

Definition of sly adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Sly definition: Clever or cunning, especially in the practice of deceit.