Look up prime mover in Wiktionary, the free dictionary.

Prime mover may mean:

• A machine that transforms energy from thermal or pressure form to mechanical form; typically an engine or turbine.

In philosophy and theology:

• Prime Mover in the cosmological argument, as a "first cause" of existence

In railways:

• Prime mover (locomotive), a component of a locomotive

In haulage:

• Prime mover (tractor unit), a structure that provides the motive power to haul a load, as in:
  • A Semi-trailer truck in Australian English
  • A Ballast tractor
  • A military vehicle hauling an artillery piece

In entertainment:

• An episode of The Twilight Zone, The Prime Mover
• Prime Mover, the 1987 hit single from Zodiac Mindwarp
• Prime Mover, the title of a song on Rush's 1987 album Hold Your Fire.
• Prime Mover (videogame), a videogame published by Psygnosis in 1993
• The Prime Movers, a quasi-omniscient race of alien superbeings in the Buck Godot comic series by Phil Foglio.

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