Definition of DEFCON in English:

DEFCON

Syllabification: DEF·CON
Pronunciation: /ˈdefˌkän/

Entry from US English dictionary

(also defcon)

noun

Each of a series of five progressive levels of alert used by the US armed forces: conventional and nuclear forces were moved to DEFCON 2 figurative my stress levels have finally reached defcon 1

Origin

1950s: acronym from defense readiness condition.

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