Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

DEFCON

play
noun DEF·CON \ˈdef-ˌkän\

Definition of DEFCON

  1. :  any of five levels of United States military defense readiness ranked according to the perceived threat to national security



Origin and Etymology of defcon

defense condition


First Known Use: 1962


Seen and Heard

What made you want to look up DEFCON? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

of, relating to, or near a shore

Get Word of the Day daily email!