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
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Kavita Lele lost her husband Sanjay, 50, and two cousins – Hemant Joshi, 45, and Atul Mone, 43 – in the attack, her brother-in-law Rajesh Kadam told CNN. Aishwarya S Iyer, CNN Money, 26 Apr. 2025 According to Breen’s brother-in-law, Corey Feist, many people worried that any move to take care of their mental health could affect their jobs. Christina Ray Stanton, New York Daily News, 26 Apr. 2025 According to Gilbert’s brother-in-law, Charles Brown, the pair fishing late at night was not out of the ordinary. Angel Saunders, People.com, 25 Apr. 2025 Her son was known in the small Massachusetts community for stepping up to raise his niece and nephew after his sister and brother-in-law died. Michael Loria, USA Today, 25 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 1 May. 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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