mother-in-law

noun
moth·​er-in-law | \ ˈmə-t͟hər-ən-ˌlȯ How to pronounce mother-in-law (audio) , ˈmət͟h-rən-, ˈmə-t͟hərn- \
plural mothers-in-law\ ˈmə-​t͟hər-​zən-​ˌlȯ How to pronounce mother-in-law (audio) \

Definition of mother-in-law

1 : the mother of one's spouse
2 archaic : stepmother

First Known Use of mother-in-law

14th century, in the meaning defined at sense 1

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The first known use of mother-in-law was in the 14th century

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Cite this Entry

“Mother-in-law.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mother-in-law. Accessed 17 Apr. 2021.

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More Definitions for mother-in-law

mother-in-law

noun

English Language Learners Definition of mother-in-law

: the mother of your husband or wife

mother-in-law

noun
moth·​er-in-law | \ ˈmə-t͟hər-ən-ˌlȯ \
plural mothers-in-law

Kids Definition of mother-in-law

: the mother of someone's husband or wife

More from Merriam-Webster on mother-in-law

Nglish: Translation of mother-in-law for Spanish Speakers

Britannica English: Translation of mother-in-law for Arabic Speakers

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