A male milk sibling.

A fellow police officer

plural of brother-german

A full brother: a brother born to the same mother and father, as distinguished from half brothers (uterine brothers), step-brothers, or 'brothers' established through relationships such as wardship.

plural of good-brother

(Scotland, obsolete) brother-in-law

(nonstandard) plural of brother-in-law

plural of full-brother

(UK, slang, archaic) Term of address for a fellow tradesman, originally a carpenter.

A sibling's older brother used especially by children or by parents in speaking to their children. / (figurative) Something that is bigger in comparison. / Alternative form of Big Brother