father-in-law

noun

ˈfä-t͟hə-rən-ˌlȯ How to pronounce father-in-law (audio)
-t͟hərn-ˌlȯ
plural fathers-in-law ˈfä-t͟hər-zən-ˌlȯ How to pronounce father-in-law (audio)
1
: the father of one's spouse
2
archaic : stepfather

Examples of father-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 Midtown East penthouse appears in season two as Barney’s father-in-law’s new residence. Abby Montanez, Robb Report, 24 Apr. 2026 During the search for Michelle Rust, her father-in-law found her vehicle in the 2400 block of Zion Road. Jt Moodee Lockman, CBS News, 22 Apr. 2026 During an ensuing search, her father-in-law found her vehicle in nearby Lansdowne, police said. Samira Asma-Sadeque, PEOPLE, 22 Apr. 2026 Police and family members conducted a search of the surrounding area, and Michelle Rust’s father-in-law discovered her vehicle, a green Dodge van, in the 2400 block of Zion Road in Lansdowne, about 4 miles from her home. Lily Carey, Baltimore Sun, 21 Apr. 2026 See All Example Sentences for father-in-law

Word History

First Known Use

14th century, in the meaning defined at sense 1

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

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Cite this Entry

“Father-in-law.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/father-in-law. Accessed 1 May. 2026.

Kids Definition

father-in-law

noun
fa·​ther-in-law
ˈfät͟h-(ə-)rən-ˌlȯ
ˈfȧt͟h-
-ərn-ˌlȯ
plural fathers-in-law
ˈfät͟h-ər-zən-
ˈfȧt͟h-
: the father of one's husband or wife

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