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.
Founded in 2010 by two sisters-in-law, Veronica Miele Beard and Veronica Swanson Beard wanted to create a brand with classics that speak to multifaceted, multitasking women. Noelle Alviz-Gransee, Kansas City Star, 22 May 2026 She is also survived by 11 great-grandchildren, one great-great-grandchild, a foster daughter, one brother, sisters-in-law and many nieces, nephews, and cousins. Ilana Kaplan, PEOPLE, 21 May 2026 In December on the show, Decider reported, Slatten and Singh were celebrating the success of their new cafe — which has since shut down — after moving in with his parents, his brother and sister-in-law and their child. Assistant Editor, Los Angeles Times, 20 May 2026 He was convicted of killing his brother, shooting and stabbing his sister-in-law, Jennifer, and the couple's young children, 11-year-old Jesse and 8-year-old Sophia, before setting their Colts Neck mansion on fire in November 2018. Alexa Herrera, CBS News, 19 May 2026 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 29 May. 2026.

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

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