Definition of propellant noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//prəˈpelənt//
    ; NAmE NAmE//prəˈpelənt//
    [countable, uncountable]
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  1. 1a gas that forces out the contents of an aerosol
  2. 2a thing or substance that propels something, for example the fuel that fires a rocket
  3. Word Originmid 17th cent.: originally from Latin propellent- ‘driving ahead (of oneself)’, from the verb propellere, later from propel.
See the Oxford Advanced American Dictionary entry: propellant