Definitionen
1.NounSon of the same parents as another person.
2.NounA male having at least one parent in common with another person (see half-brother, stepbrother).
3.NounA male fellow member of a religious community, church, trades union etc."Thank you, brother.; I would like to thank the brother who just spoke."
4.NounA form of address to a man."Brother, can you spare a dime?; Listen, brother, I don't know what you want, but I’m not interested."
5.NounA fellow black man.
6.NounSomebody, usually male, connected by a common cause, situation, or affection.
7.NounSomeone who is a peer, whether male or female.
8.NounSomeone who is a kinsman or shares the same patriarch.
9.VerbTo treat as a brother.
10.InterjectionExpressing exasperation."We're being forced to work overtime? Oh, brother!"