1) Auxiliary engine in space 2) Deceleration engine 3) Lunar landing aid 4) Rocket 5) Rocket engine 6) Thrust producer 
==History== Rockets were fitted to the nose of some models of the DFS 230, a World War II, German Military glider. This enabled the aircraft to land in more confined areas than would otherwise be possible during an airborne assault. Another World War II development was the British Hajile project, initiated by the British Admiralty`s Directorate o....
A rocket fired to reduce the speed of a spacecraft.
A small rocket engine used to reduce the velocity of a spacecraft by providing thrust in the direction opposite to that of the motion.
[n] - a small rocket engine on a larger rocket or spacecraft that is fired to slow or alter its course
noun a small rocket engine on a larger rocket or spacecraft that is fired to slow or alter its course