Meaning of “sly” in the English Dictionary

"sly" in British English

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uk /slaɪ/ us /slaɪ/ slyer, slyest
adverb uk /ˈslaɪ.li/ us /ˈslaɪ.li/

She grinned slyly and refused to tell me where the money came from.
noun [ U ] uk /ˈslaɪ.nəs/ us /ˈslaɪ.nəs/


uk /slaɪ/ us /slaɪ/

(Definition of “sly” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"sly" in American English

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us /slɑɪ/ comparative slyer, superlative slyest

not letting others know true opinions or intentions, or dishonest:

She thought that by being sly, she could fool people.
A cat can be a very sly animal.
adverb us /ˈslɑɪ·li/

He winked slyly and lowered his voice, as if he had some secret to reveal.

(Definition of “sly” from the Cambridge Academic Content Dictionary © Cambridge University Press)