Meaning of “second-guess” in the English Dictionary

"second-guess" in American English

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second-guessverb [ T ]

us /ˈsek·əndˈɡes/

second-guess verb [ T ] (CRITICIZE)

to criticize someone's decision after it has been made, and say what you think is wrong with it:

It doesn't help to second-guess their decision.

second-guess verb [ T ] (GUESS)

to guess what someone will do or what will happen

(Definition of “second-guess” from the Cambridge Academic Content Dictionary © Cambridge University Press)