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Definitions from WordNet

Noun brother-in-law has 1 sense
  1. brother-in-law - a brother by marriage
    --1 is a kind of
    in-law, relative-in-law

Definitions from the Web



1. A male relative by marriage who is the brother of one's spouse.

Example sentence: My brother-in-law is visiting us this weekend.

2. The husband of one's sibling.

Example sentence: Sarah's brother-in-law is a talented musician.

3. The husband of one's spouse's sibling.

Example sentence: Every year, we celebrate Christmas with my brother-in-law and his family.


1. Describing something that is related to or befitting a brother-in-law, especially in terms of humor or friendship.

Example sentence: We always have a brother-in-law kind of fun when we get together.

Popular Usage:

Brother-in-law is most commonly used to refer to the male relative by marriage who is the brother of one's spouse.

Local Usage:

In some regions, brother-in-law can also refer to someone who is a close friend or considered as a brother, not necessarily a relative by marriage. This usage might be more prevalent in specific cultural or local communities.

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