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English definition of “behind sb's back”

behind sb's back

If you do something behind someone's back, you do it without them knowing, often in an unfair way: Have they been saying things about me behind my back?Secrecy and privacyCheating and trickingPlotting and trapping
(Definition of behind sb's back from the Cambridge Learner's Dictionary © Cambridge University Press)

Definitions of “behind sb's back” in other dictionaries

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