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.
This newfound wealth introduced many opportunities to Jed Clampett, his mother-in-law Granny, cousin Jethro and daughter Elly May. Alice George, Smithsonian Magazine, 23 Apr. 2025 Searching for a thoughtful gift for your mother-in-law who has everything? Brie Schwartz, Glamour, 22 Apr. 2025 Here are the top options to choose from Snake plant One of the heartiest and best air-scrubbing indoor plants, this stately common beauty is also known as mother-in-law’s tongue. Rebecca Torres, USA Today, 16 Apr. 2025 Though Jeannie seemed ready to stand firm on this decision, the mother-in-law wasn't ready to back down just yet. Arabella Hau, People.com, 16 Apr. 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 2 May. 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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