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English definition of “the opposite sex”

the opposite sex

noun [S, + sing/pl verb] uk   us  
someone who is male if you are female, and female if you are male: It's not always easy to meet members of the opposite sex.Men and womenKinds of menKinds of women
(Definition of the opposite sex from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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