Used other than figuratively or idiomatically: see power, supply.
A source of power such as the mains or a generator.
That part of a piece of electronic apparatus that provides appropriate voltages for the rest of the electronics from the connected AC source.
Used other than figuratively or idiomatically: see water, power.
Mechanical or electrical energy derived from running or falling water; originally obtained from a waterwheel immersed in a stream; modern hydroelectric power is obtained from turbines fed from reservoirs.
A site capable of generating power or the right to use a site to generate power.