Meaning of “brother” in the English Dictionary

"brother" in English

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brothernoun [ C ]

uk /ˈbrʌð.ər/ us /ˈbrʌð.ɚ/

A1 a man or boy with the same parents as another person:

Do you have any brothers and sisters?
I have three brothers and a sister.
Johnny is my younger/older/big/baby/little brother.
My brother lives in Washington.

a man who is a member of the same group as you or who shares an interest with you or has a similar way of thinking to you:

[ as form of address ] "Let us unite, brothers and fight this unjust law!"

US informal sometimes used by a black man to address or refer to another black man

used as the title of a man, such as a monk, who belongs to a religious organization:

Brother Michael and Brother John were deep in conversation.
[ as form of address ] Bless you, Brother.

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(Definition of “brother” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"brother" in American English

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brothernoun [ C ]

us /ˈbrʌð·ər/

a male who has the same parents as another person:

an older/younger brother

A brother is also a member of the same race, church, religious group, or organization:

a fraternity brother

Brother may be used by a man to address another man:

Hey, brother, can you spare a quarter?


us /ˈbrʌð·ər, ˈbrʌˈðɜr/

used to express annoyance or surprise:

Oh, brother, are we in a mess now!

(Definition of “brother” from the Cambridge Academic Content Dictionary © Cambridge University Press)