early-warning system

[ur-lee wawr-ning]
noun
  1. Military. a network of radar installations designed to detect enemy aircraft or missiles in time for the effective deployment of defense systems.
  2. any series of steps established to spot potential problems.

Origin of early-warning system

First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018