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.

Source: Webster's Revised Unabridged Dictionary (1913)