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.
The American brand founded by sisters-in-law Veronica Swanson Beard and Veronica Miele Beard is moving into a 270-square-foot space fitted with picture frame moldings, curved brass hanging rails and a travertine table that wouldn’t look out of space in a Parisian interior. Lily Templeton, Footwear News, 11 Nov. 2025 Some look like historical figures, like Kam Patterson’s sister-in-law! Andy Hoglund, Entertainment Weekly, 9 Nov. 2025 Following the deaths of his brother William (Felix Kammerer) and his sister-in-law Elizabeth (Mia Goth), Victor vows vengeance on the Creature and dedicates the rest of his life to a merciless pursuit of him. Yasmeen Hamadeh, PEOPLE, 7 Nov. 2025 Dean and his fellow rafters — his wife, brother- and sister-in-law and three friends — also learned Fletcher had been banned by the Idaho attorney general from running vacation or travel-related businesses in the state or to Idaho residents for 10 years. Nicole Blanchard, Idaho Statesman, 3 Nov. 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

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Cite this Entry

“Sister-in-law.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sister-in-law. Accessed 16 Nov. 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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