1. a thief who enters a building with intent to steal
The Collaborative International Dictionary of English v.0.48:
Burglar \Bur"glar\, n. [OE. burg town, F. bourg, fr. LL. burgus
(of German origin) + OF. lere thief, fr. L. latro. See
Borough, and Larceny.] (Law)
One guilty of the crime of burglary.
Burglar alarm, a device for giving alarm if a door or
window is opened from without.
WordNet (r) 3.0 (2006):
n 1: a thief who enters a building with intent to steal
Bouvier's Law Dictionary, Revised 6th Ed (1856):
BURGLAR. One who commits a burglary. (q. v.)