brother

Son of the same parents as another person.

A male having at least one parent in common with another (see half-brother, stepbrother).

A male fellow member of a religious community, church, trades union etc.

“I would like to thank the brother who just spoke.”

A form of address to a man.

“Listen, brother, I don't know what you want, but I'm not interested.”

A black male.

Somebody, usually male, connected by a common cause or situation.

Someone who is a peer, whether male or female.

To treat as a brother.

Expressing exasperation.

“We're being forced to work overtime? Oh, brother!”