jet propulsion

noun

1. the propulsion of a body by its reaction to a force ejecting a gas or a liquid from it.

noun

1. propulsion by means of a jet of fluid
2. propulsion by means of a gas turbine, esp when the exhaust gases provide the propulsive thrust

1. The driving of an aircraft by the powerful thrust developed when a jet of gas is forced out of a jet engine.
2. Propulsion by means of any fluid that is forced out in a stream in the opposite direction. Squids, octopuses, and cuttlefish, for example, jet their way through the ocean by taking in and then quickly expelling water.