Pronunciation: (bru&thslash;'ur or, for 9, bru&thslash;'ûr'),[key] —n., pl.brothers,(Archaic)brethren; —interj.
—n. 1. a male offspring having both parents in common with another offspring; a male sibling.
2. Also calledhalf brother. a male offspring having only one parent in common with another offspring.
3. a stepbrother.
4. a male numbered among the same kinship group, nationality, race, profession, etc., as another; an associate; a fellow member, fellow countryman, fellow man, etc.: a fraternity brother. 5. Eccles. a. (often cap.) a male numbered among the lay members of a religious organization that has a priesthood.
b. a man who devotes himself to the duties of a religious order without taking holy orders, or while preparing for holy orders.
6. brothers,all members of a particular race, or of the human race in general: All men are brothers. 7. Slang.fellow; buddy: Brother, can you spare a dime? 8. Informal.a black man; soul brother.
—interj. Slang.(used to express disappointment, disgust, or surprise).