brother-in-law

noun broth·er-in-law \ ˈbrə-t͟hər-ən-ˌlȯ , ˈbrət͟h-rən- , ˈbrə-t͟hərn- \

Definition of brother-in-law

plural brothers-in-law play \ˈbrə-t͟hərz-ən-\
1 :the brother of one's spouse
2 a :the husband of one's sibling
b :the husband of one's spouse's sibling

First Known Use of brother-in-law

14th century


BROTHER-IN-LAW Defined for English Language Learners

brother-in-law

noun

Definition of brother-in-law for English Language Learners

  • : the brother of your husband or wife

  • : the husband of your sister


BROTHER-IN-LAW Defined for Kids

brother-in-law

noun broth·er-in-law \ ˈbrə-t͟hər-ən-ˌlȯ \

Definition of brother-in-law for Students

plural brothers-in-law
1 :the brother of a person's husband or wife
2 :the husband of a person's sister


Seen and Heard

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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to buzz or drone

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Bee Cubed

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

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!