mistress noun (SEXUAL PARTNER) - definition in British English Dictionary & Thesaurus - Cambridge Dictionary Online

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/ˈmɪs.trəs/ n

Definition

[C] a woman who is having a sexual relationship with a married man

Edward VII and his mistress, Lillie Langtry

(Definition of mistress noun (SEXUAL PARTNER) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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lord/master/mistress/king/queen of all you survey

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