jet propulsion

noun

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

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Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Collins

World English Dictionary

jet propulsion

—n
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

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage

Science Dictionary

jet propulsion

The driving of an aircraft by the powerful thrust developed when a jet of gas is forced out of a jet engine.
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.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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"The genius of Man in our time has gone into jet-propulsion, atom-splitting, penicillin-curing, etc. There is none over for works of imagination; of spiritual insight or mystical enlightenment. I asked for bread and was given a tranquilliser. It is important to recognise that in our time man has not written one word, thought one thought, put two notes or two bricks together, splashed colour on to canvas or concrete into space, in a manner which will be of any conceivable imaginative interest to posterity."

-Malcolm Muggeridge