sister-in-law

noun
sis·​ter-in-law | \ˈsi-st(ə-)rən-ˌlȯ, -tərn-ˌlȯ\
plural sisters-in-law\ ˈsi-​stər-​zən-​ˌlȯ \

Definition of sister-in-law 

1 : the sister of one's spouse

2a : the wife of one's sibling

b : the wife of one's spouse's sibling

First Known Use of sister-in-law

15th century, in the meaning defined at sense 1

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Time Traveler for sister-in-law

The first known use of sister-in-law was in the 15th century

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More Definitions for sister-in-law

sister-in-law

noun

English Language Learners Definition of sister-in-law

: the sister of your husband or wife

: the wife of your brother

sister-in-law

noun
sis·​ter-in-law | \ˈsi-stər-ən-ˌlȯ\
plural sisters-in-law

Kids Definition of sister-in-law

1 : the sister of someone's husband or wife

2 : the wife of someone's brother

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