mother–in–law

noun moth·er–in–law \ˈmə-thər-ən-ˌlȯ, ˈməth-rən-, ˈmə-thərn-\

: the mother of your husband or wife

plural moth·ers–in–law \ˈmə-thər-zən-\

Full Definition of MOTHER-IN-LAW

: the mother of one's spouse

archaic : stepmother

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14th century

MOTHER-IN-LAW Defined for Kids

noun moth·er–in–law \ˈmə-thər-ən-ˌlȯ\

plural mothers–in–law

: the mother of someone's husband or wife

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