A hardware system that prevents unauthorised intrusion into a premises, and reports such attempts.
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(computing) A similar software system that prevents unauthorised access.
noun
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Security-system Sentence Examples
My security system is top notch though I've had little need to utilize it.
The palace contains no moat, or armed guards, nor do I detect any sophisticated security system.
I considered a stop at the office of these people but I was intelligent enough to see it was wired with a sophisticated security system that I shall not attempt to challenge.
Our home was as isolated as Howie's place and contained no alarm or security system.
The security system didn't recognize her thumbprint.