mother-in-law
Americannoun
-
mothers-in-law
plural
noun
Other Word Forms
Noun Inflected Forms
Etymology
Origin of mother-in-law
First recorded in 1350–1400; Middle English moder in lawe; see origin at mother 1 ( def. ), in ( def. ), law 1 ( def. ); from Middle English in-lawe “in law,” i.e., “a person within the regulation and protection of the law,” based on the prohibition by Roman civil law and, later, Christian canon law, of marriages within four degrees of consanguinity, i.e., up to and including first cousins
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
Debu Sapkota, a 58-year-old driver, came to post photos of his 83-year-old mother-in-law and her granddaughter who went missing in the town of Trishuli Bazaar after being swept away by last week's surge.
From Barron's ● Sep. 1, 2026
Molly signed up for an Elite Caribbean cruise with her mother in February, also taking her husband and mother-in-law.
From The Wall Street Journal ● Aug. 27, 2026
I wear multiple hats for my 93-year-old mother-in-law, who has dementia.
From MarketWatch ● Aug. 19, 2026
He’d spent a night in a Maine hospital due to complications from a fall and then learned his mother-in-law had died.
From Los Angeles Times ● Aug. 15, 2026
My mother-in-law works for a quasi-official corporation that does two-thirds of its business with the government.
From "Woe Is I" by Patricia T. O'Conner
They teased one another, complained about overbearing mothers-in-law and celebrated milestones, like a daughter’s quinceañera.
From Los Angeles Times ● Nov. 30, 2025
No one today any longer wishes to hear jokes about nagging mothers-in-law, spendthrift wives or old jalopies, and the men and women who once told them to hardy plaudits are now forgotten.
From The Wall Street Journal ● Nov. 14, 2025
Lila Charif, Bahar Tavakolian and Laya Kadjavi, whose mothers and mothers-in-law were also close to mine, drew much inspiration from her in their own cooking.
From Salon ● Sep. 15, 2024
There, a team led by medical anthropologist Adelaide Lusambili of Africa International University conducted interviews with dozens of pregnant women, new mothers, male partners, mothers-in-law, community health care workers, and community leaders in 2021.
From Science Magazine ● Sep. 27, 2023
There are no fathers to ask for permission, no mothers-in-law to impress.
From "What the Night Sings" by Vesper Stamper
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
