Dictionary

red alert

noun

: a warning that there is great danger

Full Definition of RED ALERT

:  the final stage of alert in which enemy attack appears imminent; broadly :  a state of alert brought on by impending danger

Examples of RED ALERT

  1. The troops have been put on red alert.
  2. <the paparazzi were on red alert for sightings of the hot new Hollywood couple>

First Known Use of RED ALERT

1941

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