first gear, low gear, low, first - the lowest forward gear ratio in the gear box of a motor vehicle; used to start a car moving

gearset - a set of gears

high gear, high - a forward gear with a gear ratio giving high vehicle velocity for a given engine speed

mechanism - device consisting of a piece of machinery; has moving parts that perform some function

park - a gear position that acts as a parking brake; "the put the car in park and got out"

reverse - the gears by which the motion of a machine can be reversed

second gear, second - the gear that has the second lowest forward gear ratio in the gear box of a motor vehicle; "he had to shift down into second to make the hill"

steering gear - a gear that couples the steering wheel to the steering linkage of a motor vehicle

third gear, third - the third from the lowest forward ratio gear in the gear box of a motor vehicle; "you shouldn't try to start in third gear"

transmission system, transmission - the gears that transmit power from an automobile engine via the driveshaft to the live axle