fire wall

(noun) (colloquial) the application of maximum thrust. Synonyms: firewall. Example: "He moved the throttle to the firewall."

(noun) (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. Synonyms: firewall.

(noun) a fireproof (or fire-resistant) wall designed to prevent the spread of fire through a building or a vehicle. Synonyms: firewall.