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.
Her father argued that if her mother-in-law was allowed to wear the shirt, then his wife should also be able to. Ashley Vega, PEOPLE, 10 Oct. 2025 Edgar Allan Poe, adopted son of a Virginian enslaver; Edgar Allan Poe, who managed the sale of a human being owned by his mother-in-law. Literary Hub, 8 Oct. 2025 At the time, a flustered Griffin blanched at the question and noted that her mother-in-law was in the studio audience. Edward Segarra, USA Today, 8 Oct. 2025 On July 14, a jury of 10 women and two men found Serafini guilty of first-degree murder and attempted murder for the shooting that killed his father-in-law Gary Spohr, 70, and severely wounded his mother-in-law, Wendy Wood, 68, at their home near Lake Tahoe. Rosalio Ahumada, Sacbee.com, 7 Oct. 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 17 Oct. 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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