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Meaning of white alert

white' alert'

Pronunciation: [key]
  1. (in military or civilian defense) an all-clear signal, directive, etc., indicating that the danger of air raid no longer exists.
  2. a return to normal conditions following an attack or a threat of attack. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.