Definitions by Chess24

det 

In the military, det is short for detect or detected. The popularity of this term, as with other military terminology, has been adopted by the video game community.

A second usage, det is also short for and used to refer to a person or item that can detect; detector or detection.

* Intimate radar contact det 20 miles
* Purchase a det because they are building stealth units.

det by Chess24 December 19, 2012