Definition

1. Noun:
   • An electrical device that sets off an alarm when someone tries to break in: A physical system designed to detect unauthorized entry into a building, area, or vehicle and to alert occupants or authorities.
   • (Computing) A system that enforces boundaries between computer networks: A set of hardware and software measures designed to protect a computer network or system from unauthorized access, attacks, or data breaches.

Usage Examples

• Noun (Physical Device):

  • The office installed a new security system after the break-in.
  • When the window was forced open, the security system triggered a loud alarm.

• Noun (Computing):

  • A firewall is a critical component of any network security system.
  • The company's security system blocked the attempted cyber attack.

Advanced Usage

• "to bypass a security system": to find a way to avoid or deactivate the protective measures.
  • The thief managed to bypass the building's security system.
• "to integrate a security system": to combine different security components into a unified, functioning whole.
  • We integrated the cameras and motion sensors into a single, smart security system.

Variants and Related Words

• Security (n): The state of being free from danger or threat; measures taken to achieve this state.
  • The airport has very tight security.
• System (n): A set of connected things or parts forming a complex whole.
  • The solar system has eight planets.

Synonyms

• Alarm system: A system that gives a warning signal.
• Surveillance system: A system that monitors activity, often using cameras.
• Network security: Measures to protect a computer network.
• Intrusion detection system (IDS): A device or software that monitors a network for malicious activity.

Related Phrases

• Security system monitoring: A service where a remote center watches for alerts from a security system and contacts emergency services if needed.
  • We pay for 24/7 security system monitoring.
• Home security system: A security system designed for residential use.
  • They decided to invest in a comprehensive home security system.

Related Idioms

• A false sense of security: A feeling of being safe that is not based on a real or adequate level of protection.
  • Leaving the door unlocked gave him a false sense of security.
• Tighten security: To increase or strengthen protective measures.
  • After the incident, the museum decided to tighten security.

Noun

1. an electrical device that sets off an alarm when someone tries to break in
2. (computing) a system that enforces boundaries between computer networks