- Used other than a figurative or idiomatic meaning: see water, power.
- (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
- (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
(uncountable) power from water
(countable) site or right