brothers

noun pl. brothers, brethren

1. a man or boy as he is related to the other children of his parents: sometimes also used of animals
2. a man or boy related to one by having a parent in common; half brother
3. a stepbrother
4. a foster brother
5. a close male friend who is like a brother
6. a fellow human being
7. a male fellow member of the same race, church, profession, organization, etc.: fraternity brother, soul brother
8. a lay member of a men's religious order
9. Informal any man: often used as a familiar term of address

interjection