Definitions from Wiktionary (firewall)

▸ noun:  (architecture) A fireproof barrier used to prevent the spread of fire between or through buildings, structures, electrical substation transformers, or within an aircraft or vehicle.
▸ noun:  (computer security) The software that monitors traffic in and out of a private network or a personal computer and allows or blocks such traffic depending on its perceived threat.
▸ noun:  (physics) A hypothetical phenomenon where an observer falling into a black hole encounters high-energy quanta at or near the event horizon.
▸ verb:  (transitive, computer security) To protect with a firewall.
▸ verb:  (transitive, computer security) To block with a firewall.
▸ verb:  (intransitive, motor vehicles or aircraft, slang) To use maximum engine power or acceleration.
▸ Also see firewall

---

▸ Words similar to firewalls
▸ Usage examples for firewalls

▸ Idioms related to firewalls
▸ Wikipedia articles (New!)
▸ Popular adjectives describing firewalls
▸ Words that often appear near firewalls
▸ Rhymes of firewalls

▸ Invented words related to firewalls