reaction engine

noun Aeronautics, Rocketry.

an engine that produces power as a reaction to the momentum given to gases ejected from it, as a rocket or jet engine.

Nearby words

  1. react,
  2. reactance,
  3. reactant,
  4. reaction,
  5. reaction chamber,
  6. reaction formation,
  7. reaction of degeneration,
  8. reaction time,
  9. reaction turbine,
  10. reaction, chemical

Origin of reaction engine

First recorded in 1865–70

Also called reaction motor. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for reaction engine

British Dictionary definitions for reaction engine

reaction engine

reaction motor


an engine, such as a jet or rocket engine, that ejects gas at high velocity and develops its thrust from the ensuing reaction
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012