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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.
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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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