Wordnet 3.0
NOUN (1)
1. 
 a portable .30 caliber automatic rifle operated by gas pressure and fed by cartridges from a magazine; 
 used by United States troops in World War I and in World War II and in the Korean War; 
[syn: Browning automatic rifle, BAR]
WordNet (r) 3.0 (2006):
Browning automatic rifle
    n 1: a portable .30 caliber automatic rifle operated by gas
         pressure and fed by cartridges from a magazine; used by
         United States troops in World War I and in World War II and
         in the Korean War [syn: Browning automatic rifle, BAR]