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English definition of “win someone over”

win someone over

verb [I/T] phrasal verb with win  /wɪn/ (present participle winning, past tense and past participle won  /wʌn/) us  
to succeed in getting someone's support or agreement, esp. when the person was previously opposed to you: He had some good ideas, but failed to win over Congress.
(Definition of win someone over from the Cambridge Academic Content Dictionary © Cambridge University Press)
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