sister-in-law

noun

sis·​ter-in-law ˈsi-st(ə-)rən-ˌlȯ 

-tərn-ˌlȯ

plural sisters-in-law ˈsi-stər-zən-ˌlȯ 

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

Moreno’s sister-in-law had previously shared an email address for Johnson at the Health Science Center. —Anagilmara Vílchez, NBC News, 19 Dec. 2024

Following the announcement of her podcast last month, Travis showed his sister-in-law tons of support for her new career endeavor. —Danielle Jennings, People.com, 19 Dec. 2024

After the long dinner, wives and sisters-in-law gathered in the kitchen, helping clean up and doing their best to connect in different languages, while the rest of the party moved into the sunken living room. —Carolynn Carreño, Los Angeles Times, 19 Dec. 2024

Kylie Kelce, wife of Jason (and sister-in-law of Travis), recently booted Joe Rogan from his No. 1 perch on Spotify and Apple with her new podcast, Not Gonna Lie. —Justin Curto, Vulture, 19 Dec. 2024

Word History

First Known Use

15th century, in the meaning defined at sense 1

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