1. br - Noun
2. br - Adjective
3. Br - Proper noun
a nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water
a Marxist-Leninist terrorist organization that arose out of a student protest movement in the late 1960s; wants to separate Italy from NATO and advocates violence in the service of class warfare and revolution; mostly inactive since 1989
Source: WordNet