Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

sister–in–law

play
noun sis·ter–in–law \ˈsis-t(ə-)rən-ˌlȯ, -tərn-ˌlȯ\

Simple Definition of sister–in–law

  • : the sister of your husband or wife

  • : the wife of your brother

Full Definition of sister–in–law

plural sis·ters–in–law play \-tər-zən-\

  1. 1 :  the sister of one's spouse

  2. 2a :  the wife of one's brotherb :  the wife of one's spouse's brother

15th Century

First Known Use of sister–in–law

15th century


SISTER–IN–LAW Defined for Kids

sister–in–law

play
noun sis·ter–in–law \ˈsi-stər-ən-ˌlȯ\

Definition of sister–in–law

plural sis·ters–in–law

  1. 1 :  the sister of someone's husband or wife

  2. 2 :  the wife of someone's brother




Learn More about sister–in–law


Seen and Heard

What made you want to look up sister–in–law? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 7, 2016

a slight offense

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

spindrift pince-nez kittly-benders duvet
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ