Definition of early warning system Early warning system

We found 2 definitions of early warning system from 2 different sources.

What does early warning system mean?

Noun
early warning system - a network of radar installations designed to detect enemy missiles or aircraft while there is still time to intercept them
		electronic network, network (broadcasting) a communication system consisting of a group of broadcasting stations that all transmit the same programs; "the networks compete to broadcast important sports events"

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early warning system
Any series of procedures and devices designed to detect sudden or potential threats to persons, property or the environment at the first sign of danger.