drill instructor
noun1
Government, Military, Politics, War US The generic term for the principal instructor of fresh military recruits undergoing basic training in the various branches of the United States military, routinely abbreviated to the initialism DI; always filled by enlisted personnel (a sergeant or petty officer).
- Army: drill sergeant
- Navy: recruit division commander
3 more examples
- Marine Corps: drill instructor
- Air Force: military training instructor
- Coast Guard: company commander