Meaning of “put your finger on sth” in the English Dictionary

british dictionary

"put your finger on sth" in British English

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put your finger on sth

C2 to discover the exact reason why a situation is the way it is, especially when something is wrong:

There's something odd about him, but I can't quite put my finger on it.

(Definition of “put your finger on sth” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)