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WordNet (r) 3.0 (2006) (WordNet)

Br
n 1: a nonmetallic heavy volatile corrosive dark brown liquid
element belonging to the halogens; found in sea water [synonym:
{bromine}, {Br}, {atomic number 35}]
2: 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
[synonym: {Red Brigades}, {Brigate Rosse}, {BR}]