sister-in-law

noun

sis·​ter-in-law ˈsi-st(ə-)rən-ˌlȯ How to pronounce sister-in-law (audio)
-tərn-ˌlȯ
plural sisters-in-law ˈsi-stər-zən-ˌlȯ How to pronounce sister-in-law (audio)
1
: the sister of one's spouse
2
a
: the wife of one's sibling
b
: the wife of one's spouse's sibling

Examples of sister-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.
Talitha Frazier, Gonzalez’s sister-in-law, told WTNH that the fight was more proof that Smith was unhinged and a threat to society. Stepheny Price, FOXNews.com, 3 May 2025 She is survived by her brother and sister-in-law, as well as nephews and cousins. Jami Ganz, New York Daily News, 2 May 2025 He also is survived by two brothers, Michael and Peter; two grandchildren, Gianna Lussier and Imogen Doumani; and his sister-in-law, Carol. Patrick Comiskey, Los Angeles Times, 2 May 2025 After the fact, the poster said that her husband called both the best man and her sister-in-law’s fiancé to tell them off over the incident. Kimberlee Speakman, People.com, 2 May 2025 See All Example Sentences for sister-in-law

Word History

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of sister-in-law was in the 15th century

Browse Nearby Words

Cite this Entry

“Sister-in-law.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sister-in-law. Accessed 10 May. 2025.

Kids Definition

sister-in-law

noun
sis·​ter-in-law
ˈsis-t(ə-)rən-ˌlȯ,
-tərn-ˌlȯ
plural sisters-in-law
-tər-zən-
1
: the sister of one's spouse
2
a
: the wife of one's sibling
b
: the wife of one's spouse's sibling

More from Merriam-Webster on sister-in-law

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