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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Last month, after arbitration proceedings were initiated against her, Peter Seidler’s widow, Sheel Seidler, sued her brothers-in-law Matt and Bob Seidler, accusing them of breaches of fiduciary duty and stating her case to be named the franchise’s control person. Dennis Lin, The Athletic, 2 Feb. 2025 Jones recalls the late Prince coming into the Vanity Fair Oscar Party sucking a lollipop alongside two bodyguards, one of whom was his brother-in-law. Baz Bamigboye, Deadline, 31 Jan. 2025 Samuel Lilley’s former brother-in-law, Greg Gibson, remembered him for his passion for flying and willingness to help others. Ivan Pereira, ABC News, 30 Jan. 2025 Blake Lively's brother-in-law has entered the chat. Nicole Fallert, USA TODAY, 30 Jan. 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

Dictionary Entries Near brother-in-law

Cite this Entry

“Brother-in-law.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brother-in-law. Accessed 11 Feb. 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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