Definition

Noun: 1. A warning device that is tripped off by the occurrence of a burglary: A system of sensors and electronic components designed to detect unauthorized entry into a building or area and to alert the occupants or authorities. 2. A loud warning signal produced by such a device: The audible alarm sound itself, typically a loud siren or bell, that is activated when the system is triggered.

Usage Examples

• As a device/system:
  • The store installed a new burglar alarm after the break-in.
  • Remember to set the burglar alarm before you leave the house.
• As the audible signal:
  • A burglar alarm was going off in the apartment next door.
  • The sudden sound of the burglar alarm startled everyone.

Advanced Usage

• "to trigger/set off a burglar alarm": To cause the alarm to sound.
  • The cat jumping through the window set off the burglar alarm.
• "a burglar alarm goes off": Describes the moment the alarm starts sounding.
  • If the burglar alarm goes off, the police will be notified automatically.

Variants and Related Words

• Security system (n): A broader term that can include burglar alarms, cameras, and access controls.
• Intruder alarm (n): A synonym often used in British English.
• Alarm system (n): A general term for any warning system, which may include fire or burglar alarms.

Synonyms

• Intrusion detection system: A more technical term.
• Security alarm: A general synonym.

Related Phrases

• False alarm: When a burglar alarm is triggered without an actual burglary occurring.
  • The strong wind caused a false alarm.
• Alarm monitoring: A service where a remote company watches for alarm signals and contacts emergency services.
  • Their burglar alarm is under 24-hour alarm monitoring.

Noun

1. a warning device that is tripped off by the occurrence of a burglary
2. a loud warning signal produced by a burglar alarm
   • they could hear the burglar alarm a mile away