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
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She is survived by her sister Sue, brother-in-laws Jack and Steve, sister-in-law Shannon and seven nephews and nieces. Dan Albano, Oc Register, 25 Apr. 2026 Community remembers teen killed Michelle Gonzalez, 17, was one of the victims, according to her sister-in-law. Alexa Herrera, CBS News, 24 Apr. 2026 His sister-in-law and another child also sustained injuries in the attack. Chelsea Bailey, CNN Money, 22 Apr. 2026 Elizabeth Taylor and Paul Newman starred, with Ives and Madeleine Sherwood, as Brick’s busybody sister-in-law, reprising their stage roles. Greg Evans, Deadline, 21 Apr. 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 4 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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