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|Noun||1.||security system - (computing) a system that enforces boundaries between computer networks|
firewall - (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
system - instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity; "he bought a new stereo system"; "the system consists of a motor and a small computer"
|2.||security system - an electrical device that sets off an alarm when someone tries to break in|
electrical device - a device that produces or is powered by electricity