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Definition of prime mover:

  1. In mech., a natural force applied to the production of power, such as muscular force, the weight and motion of fluids, & c.; an engine or piece of mechanism which receives and modifies force or motion in order to apply them to drive other machines.


mogul, mover and shaker, first cause, a force to be reckoned with, leading light, primum mobile, magnate, figure, authority figure, author, eminence, creator, god, VIP.