Wordnet 3.0
NOUN (2)
1.
a loud warning signal produced by a burglar alarm;
- Example: "they could hear the burglar alarm a mile away"2.
a warning device that is tripped off by the occurrence of a burglary;
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.
[1913 Webster]
Burglar alarm, a device for giving alarm if a door or
window is opened from without.
[1913 Webster]
WordNet (r) 3.0 (2006):
burglar alarm
n 1: a loud warning signal produced by a burglar alarm; "they
could hear the burglar alarm a mile away"
2: a warning device that is tripped off by the occurrence of a
burglary