Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “sister-in-law”

See all translations


noun [C] uk   /ˈsɪs.tə.rɪn.lɔː/ us    /-tɚ.ɪn.lɑː/ ( plural sisters-in-law)
B2 the wife of your brother or sister, or the sister of your husband or wife, or the wife of the brother or sister of your husband or wife
(Definition of sister-in-law from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of sister-in-law?
Add Cambridge dictionaries to your browser to your website

Definitions of “sister-in-law” in other dictionaries

Word of the Day


a baby pig

Word of the Day

I won’t tolerate it! Replacing formal words with phrasal verbs.

by Liz Walter,
April 01, 2015
When you are using a language, it is important to understand if a word is formal or informal, so that you can use it in an appropriate way. You might hear people saying dosh for money, or spud for potato, but they wouldn’t write those words in a formal essay. Similarly, a

Read More 

stackin’ p

March 30, 2015
idiom slang earning a lot of money ‘That’s a very generous present.”Yeah, well, she’s stackin’ p, innit?’

Read More