- a piece of mechanism with a particular action or function.
- the action of such a mechanism.
verb (used with object)
verb (used without object)
Origin of motion
- the capacity for movement
- a manner of movement, esp walking; gait
- the evacuation of the bowels
- part of a moving mechanism
- the action of such a part
- to act or perform the task (of doing something) mechanically or without sincerity
- to mimic the action (of something) by gesture
Word Origin for motion
late 14c., "suggestion; process of moving," from Old French mocion "movement, motion; change, alteration" (13c.), from Latin motionem (nominative motio) "a moving, a motion; an emotion," from past participle stem of movere "to move" (see move (v.)). Motion picture attested from 1896.
late 15c., "to request, petition" (obsolete), from motion (n.). The sense in parliamentary procedure first recorded 1747; with meaning "to guide or direct by a sign, gesture, movement" it is attested from 1787. Related: Motioned; motioning.
see go through the motions; set in motion; set the wheels in motion.