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.
My mother and mother-in-law made yeast rolls for holidays and when company came to visit. Anne Byrn, Southern Living, 22 Nov. 2025 Inspired in part by his suffragist mother-in-law, Matilda Joslyn Gage, who wrote one of the first historical studies of witch trials as a system of oppression against women, Baum actually created female characters who challenged the earlier tropes about witches and brooms. Time, 21 Nov. 2025 This is far from the first time that the Duchess of Sussex has matched her late mother-in-law. Meredith Kile, PEOPLE, 21 Nov. 2025 Indeed, Catherine’s dedication to supporting children in their earliest years has reminded many of her late mother-in-law’s. Daniel Rodgers, Vogue, 18 Nov. 2025 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 26 Nov. 2025.

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

More from Merriam-Webster on mother-in-law

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