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English definition of “tell”

tell

verb [I/T] (KNOW)   /tel/ (past tense and past participle told  /toʊld/)
to know or recognize: [I] It’s hard to tell which is better. [T] It’s easy to tell a robin by its red breast. [+ (that) clause] I could tell that you were unhappy. [T] This one is supposed to be better, but how can you tell the difference?
(Definition of tell verb (KNOW) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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