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English definition of “lose sight of sth”

lose sight of sth

C2 to forget about an important idea or fact because you are thinking too much about other things: Some members of the peace-keeping force seem to have lost sight of the fact that they are there to help people.Forgetting and forgetfulness
(Definition of lose sight of sth from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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