2. Noun. (slang) brother; a male comrade or friend; one who shares one’s ideals. ¹
3. Noun. (slang) brother; an African-American. ¹
4. Noun. (slang) (non-gloss definition Used to address a male) ¹
¹ Source: wiktionary.com
Definition of Bro
1. a brother [n BROS] - See also: brother