brother-in-law

noun

broth·​er-in-law ˈbrə-t͟hər-ən-ˌlȯ How to pronounce brother-in-law (audio)
ˈbrət͟h-rən-,
ˈbrə-t͟hərn-
plural brothers-in-law ˈbrə-t͟hərz-ən- How to pronounce brother-in-law (audio)
1
: the brother of one's spouse
2
a
: the husband of one's sibling
b
: the husband of one's spouse's sibling

Examples of brother-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.
Survivors include her brother Dave, nieces Jennifer and Laura, and her brother-in-law, Vic. Marc Berman, Forbes.com, 2 Apr. 2025 In addition to her brother, Maloney is survived by her nieces Jennifer and Laura and her brother-in-law, Vic. Ingrid Vasquez, People.com, 1 Apr. 2025 In addition to her brother, survivors include her nieces, Jennifer and Laura, and her brother-in-law, Vic. Mike Barnes, HollywoodReporter, 1 Apr. 2025 While on her way to visit her sister, Philomela is deceived and raped by Tereus, her brother-in-law. Bekah Waalkes, The Atlantic, 1 Apr. 2025 See All Example Sentences for brother-in-law

Word History

First Known Use

14th century, in the meaning defined at sense 1

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

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Cite this Entry

“Brother-in-law.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brother-in-law. Accessed 9 Apr. 2025.

Kids Definition

brother-in-law

noun
broth·​er-in-law
ˈbrət͟h-(ə-)rən-ˌlȯ,
ˈbrət͟h-ərn-ˌlȯ
plural brothers-in-law
ˈbrət͟h-ər-zən-
1
: the brother of one's spouse
2
: the husband of one's sibling or of one's spouse's sibling

More from Merriam-Webster on brother-in-law

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