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Definition DEFCON in British English

DEFCON noun

noun
1

a series of 5 levels of alert used by the US armed forces

Example

U.S. President Richard Nixon reportedly increased the national security warning to DEFCON 3 and placed the U.S. Navy's Sixth Fleet on high alert in the Mediterranean Sea.

Example

Before everyone goes to DefCon 5 on Barnier warning he won't propose moving to next stage of talks, expectation he would was almost zero.

Definition DEFCON in British English