1. a plant, including engines, dynamos, etc., and the building or buildings necessary for the generation of power, as electric or nuclear power.
2. the machinery for supplying power for a particular mechanical process or operation.
3. the engine, motor, or other power source along with related ignition, transmission, etc., components of a vehicle, aircraft, machine, etc. Also,pow'er•plant".
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.