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ménage à trois

noun mé·nage à trois \-ä-ˈt(r)wä\

Simple Definition of ménage à trois

  • : an arrangement in which three people have sex with each other especially while living together

Source: Merriam-Webster's Learner's Dictionary

Full Definition of ménage à trois

  1. :  an arrangement in which three persons (as a married pair and the lover of one of the pair) share sexual relations especially while living together

Origin and Etymology of ménage à trois

French, literally, household for three

First Known Use: 1856

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looking or feeling very sad

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