Meaning of “know all there is to know about sth” in the English Dictionary

british dictionary

"know all there is to know about sth" in British English

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know all there is to know about sth

approving

to know a lot about a subject or activity, or be very good at it

(Definition of “know all there is to know about sth” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

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