firewall

/fˈaɪɹwɑl/ · 2 syllables

Meaning

noun

1. (colloquial) the application of maximum thrust
   “he moved the throttle to the firewall”
2. (computing) a security system consisting of a combination of hardware and software that limits the exposure of a computer or computer network to attack from crackers; commonly used on local area networks that are connected to the internet
3. a fireproof (or fire-resistant) wall designed to prevent the spread of fire through a building or a vehicle