noun
1. (computing) a system that enforces boundaries between computer networks
• Topics: ↑computer science, ↑computing
• Hypernyms: ↑system
• Hyponyms: ↑firewall
2. an electrical device that sets off an alarm when someone tries to break in
• Syn: ↑security measure, ↑security
• Hypernyms: ↑electrical device
* * *
security system,
any system for maintaining or safeguarding national or international security.
Useful english dictionary. 2012.