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DEFCON

[def-kon]
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noun
  1. any of several alert statuses for U.S. military forces, ranked numerically from normal, 5, to maximum readiness, 1.

Origin of DEFCON

def(ense readiness) con(dition)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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