Home UK English yellow alert

Meaning of yellow alert in English:

yellow alert

noun

Military

  • A warning that danger, or an emergency, is thought to be near but not actually imminent; an instruction to be prepared for an emergency; (in "on yellow alert") an initial state of readiness to respond to an emergency; compare sense A. 11 and "amber alert", red alert .

Origin

1940s; earliest use found in The Bismarck Tribune.