a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motionwheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed; "the fool got his tie caught in the geartrain"
a mechanism for transmitting motion for some specific purpose (as the steering gear of a vehicle)equipment consisting of miscellaneous articles needed for a particular operation or sport etc.