water power

water power (usually uncountable, plural water powers)

1. Used other than figuratively or idiomatically: see water,‎ power.
2. (uncountable) 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.
   • 1952 January, “Electrification Progress in Norway”, in Railway Magazine, page 54:

     Advantage has been taken of the abundant natural water-power resources (which compensate, to a large extent, for the absence of coal) and some 660 route miles have been electrified with overhead conductors.

3. (countable) A site capable of generating power or the right to use a site to generate power.

• (mechanical or electrical power derived from water): hydropower

• water-powered

• hydroelectricity