Synonym: actuation. Similar words: propulsive, expulsion, repulsion, compulsion, avulsion, revulsion, convulsion, convulsions. Meaning: [prə'pʌlʃn] 
n. 1. a propelling force 2. the act of propelling.
n. 1. a propelling force 2. the act of propelling. 
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(1) This aircraft works by jet propulsion.
(2) Interest in jet propulsion was now growing at the Air Ministry.
(3) The fish uses its tail fins for propulsion through the water.
(4) This is the secret of rocket propulsion.
(5) As it turned out, the propulsion system performed normally.
(6) As with the service propulsion system, the propellants were force-fed to the engine by pressurized helium from a storage tank.
(7) The eclipse of electricity as a means of propulsion has been one of the more curious facets of the evolution of transport.
(8) Refinements for the propulsion system came from a group working with Kensaku Imaichi at Osaka University.
(9) It also provided the main propulsion system for the Apollo spacecraft.
(10) The principle of propulsion by Flettner rotors suffers still from their ignominious fate.
(11) The Voith Schneider propulsion system provided the high level of manoeuvrability required for port operations and for barge handling in the estuary.
(12) That book contained a proposal for electrical propulsion of spacecraft, a technique we would now call ion propulsion.
(13) The results are being processed at the Jet Propulsion Laboratory, California.
(14) For propulsion, it relies on the aerospike, a linear rocket engine.
(15) Both creatures can, like the nautilus, use jet propulsion on occasion.
(16) First and most radical, a new means of propulsion other than the internal combustion engine might be considered.
(17) This kind of propulsion system is called a solar thermal rocket.
(18) The nineteenth century witnessed a revolution in ship design and propulsion.
(19) The pods themselves were quite complex, but essentially they were multi-skinned torpedoes equipped with minimal propulsion and life-support systems.
(20) Most sea snakes have a compressed, oar-like tail, used for propulsion through the water.
(21) Somewhere inside itself, the thing had a sort of jet propulsion.
(22) If the muscularis propria escapes extensive damage, we assume that the impaired bowel propulsion is allowed to recover to some extent.
(23) The most appropriate way of accelerating charged particles for use in a propulsion system is to use a linear accelerator.
(24) Their swim fins are extra long to provide maximum propulsion and minimum strain.
(25) But power for activities in the belt and for propulsion of spacecraft is harder to find. Sentencedict.com
(26) The batteries are charged on-board by a small gas turbine auxiliary propulsion unit.
(27) The most significant of these may be the use of helium-3 in spacecraft propulsion, in a fusion rocket.
(28) Their fins and tail are freed for guidance and rapid propulsion.
(29) Both missions depart from the space station using hydrogen-oxygen chemical propulsion.
(30) The pectoral and pelvic fins and the dorsal along the crest of the back play no part in propulsion.
More similar words: propulsive, expulsion, repulsion, compulsion, avulsion, revulsion, convulsion, convulsions, impulsive, compulsive, repulsive, impulsively, compulsively, impulsiveness, prop up, population, overpopulation, popularization, professional organization, proportion, provision, profusion, proposition, propagation, procession, profession, provisions, propitiation, crop rotation, proportional.