moved or operated or effected by liquid (water or oil), of or relating to the study of hydraulics, Pertaining to water

Such a machine distinguished from an electric, spring-driven, or hydraulic motor by its use of a fuel, A fire engine, a machine tool, transitive verb_ To equip with an engine; -- said especially of steam vessels, obsolete To assault with an engine, verb_ obsolete To rack; to torture, dated To equip with an engine; said especially of steam vessels