Power derived from water heated into steam, usually converted to motive power by a reciprocating engine (a steam engine) or turbine (a steam turbine).
Means of transportation, or heavy equipment, based on such power, especially steamboats, steamships, or steam trains.
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.
Used other than figuratively or idiomatically: see water, power.
A site capable of generating power or the right to use a site to generate power.