noun
- a military officer or noncommissioned officer who supervises and directs parachute jumps, especially from aircraft
Usage: military; often abbreviated as JM
Examples
- The jumpmaster checked all the paratroopers' equipment before the drop.
- She earned her jumpmaster certification after completing the rigorous training course.
- The jumpmaster gave the signal, and the first squad jumped from the plane.
- Every soldier must follow the jumpmaster's instructions during airborne operations.
- The jumpmaster inspected the parachutes to ensure they were properly packed.
- As jumpmaster, he was responsible for the safety of all personnel during the jump.