Definition of DEFCON in English:


Syllabification: DEF·CON
Pronunciation: /ˈdefˌkän
(also defcon)


  • 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
    More example sentences
    • Tolerance level for people in general is at DEFCON 1.
    • I'm at DEFCON - 3 with the washing machine actually.
    • The Defense Department has these procedures - the "Defense Condition," or DEFCON, system.


1950s: acronym from defense readiness condition.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day coloratura
Pronunciation: ˌkɒlərəˈtjʊərə
elaborate ornamentation of a vocal melody