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

Examples of mother-in-law in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Though the craft has traditionally been passed down from mother to daughter across Gullah Geechee communities, Alston learned the skill from his mother-in-law 22 years ago and is now a fifth-generation sweetgrass weaver. Arati Menon, Condé Nast Traveler, 7 June 2026 My 90-year-old mother-in-law has been in cognitive decline for a while. Eric Thomas, Sun Sentinel, 6 June 2026 Gyorgy’s mother-in-law, Vinita Burns, was there as well. Steve Buckley, New York Times, 5 June 2026 My mother-in-law stabilized, but cell reception was poor and updates were few and far between. Steven Rowley, PEOPLE, 3 June 2026 See All Example Sentences for mother-in-law

Word History

First Known Use

14th century, in the meaning defined at sense 1

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

Cite this Entry

“Mother-in-law.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mother-in-law. Accessed 9 Jun. 2026.

Kids Definition

mother-in-law

noun
moth·​er-in-law
ˈmət͟h-(ə-)rən-ˌlȯ
ˈmət͟h-ərn-ˌlȯ
plural mothers-in-law
ˈmət͟h-ər-zən-
: the mother of one's husband or wife

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