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Definition of Firewall
1. Noun. (colloquial) the application of maximum thrust. "He moved the throttle to the firewall"
2. 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.
3. Noun. A fireproof (or fire-resistant) wall designed to prevent the spread of fire through a building or a vehicle.
Generic synonyms: Wall
Definition of Firewall
1. a computer component that prevents unauthorized access to data [n -S]