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

Jana, who married Stephen Wissmann on Aug. 15, shared a video on YouTube of her visit to a bridal store with sisters Jessa and Joy-Anna and sister-in-law Abbie Jana Duggar is lifting the veil on her search for her dream wedding dress! —Erin Clack, Peoplemag, 10 Sep. 2024

Twice, in front of his wife and our sister-in-law, Logan pulled me tightly close into his hips. —Jeanne Phillips, The Mercury News, 7 Sep. 2024

One of her first calls was to Jennifer McCabe, the sister-in-law of Brian Albert, who was part of the group from the night before. —Meghan Mariani, ABC News, 6 Sep. 2024

His wife and sister-in-law promised to be on hand for the event. —Robert Leonard, USA TODAY, 5 Sep. 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