Definitions for power plant
Random House Webster's College Dictionary
a plant, including engines, dynamos, etc., and the building or buildings necessary for the generation of power, as electric or nuclear power.
the machinery for supplying power for a particular mechanical process or operation.
Origin of power plant:
power station, power plant, powerhouse(noun)
an electrical generating station
Kernerman English Learner's Dictionary
power plant(noun)ˈpaʊ ər lɪs
a large facility that produces electricity
a coal-fired power plant
A station built for the production of electric power.
The portion of a vehicle devoted to providing energy for motion; the engine or motor.