A network of sensing devices, such as satellites or radar, for detecting an enemy attack in time to take defensive or counteroffensive measures.
A system or procedure designed to warn of a potential or an impending problem.
Early-warning-system Sentence Examples
Gardenia yellow leaves provide an early warning system to the gardener, a signal something is wrong with the plant.
The Amber Alert System that stemmed from the death of this child is an early warning system designed to notify as many people as possible through broadcasting announcements.
Throughout the years following the launch of the Amber Alert in Texas, there have been many changes and legislative actions leading to the growth and development of this important early warning system.
Whether it is some vestigial part of primate clan and tribe definition, or early warning system of predatory approach, or mating ritual, I don't know.