Definitions
There are 2 meanings of the phrase
Burglar Alarm.
Burglar Alarm - as a noun
A loud warning signal produced by a burglar alarm
Example: "They could hear the burglar alarm a mile away"
A warning device that is tripped off by the occurrence of a burglary
Example Sentences
"The burglar alarm went off and scared away the intruder."
"We installed a burglar alarm system in our house."
"The loud sound of the burglar alarm alerted the neighbors."
"The burglar alarm was triggered when someone tried to break into the store."
"She forgot to set the burglar alarm before leaving for vacation."