2As a title preceding a man's name, especially a forename: ‘Brother’.
Frequently in the names of male animals in Anancy stories.
3 slang A (fellow) Caribbean or Rastafarian man; (more generally) a man, a guy, especially when considered as a fellow member of a particular social or cultural group; (hence) a close male associate or friend. Compare "brother", bredren .
Now frequently in British (chiefly Afro-Caribbean) usage.
Mid 19th century. Representing a Caribbean or African-American pronunciation of brother.