Definitions
1.adjectiveOf or akin to; related; like
2.nounSon of the same parents as another person.
3.nounA male having at least one parent in common with another (see half-brother, stepbrother).
4.nounA male fellow member of a religious community, church, trades union etc."I would like to thank the brother who just spoke."
5.nounA form of address to a man."Listen, brother, I don't know what you want, but I'm not interested."
6.nounA black male.
7.nounSomebody, usually male, connected by a common cause or situation.
8.nounSomeone who is a peer, whether male or female.