from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the warning signal that begins a period of preparation for an enemy air attack
  • noun the condition in which combat aircraft are airborne and ready for an operation
  • noun the time period during which military and civilian agencies are prepared for an enemy air attack


Sorry, no etymologies found.


    Sorry, no example sentences found.


Log in or sign up to get involved in the conversation. It's quick and easy.