The noun motion has 7 senses (first 6 from tagged texts)
1. (22) movement, motion -- (a natural event that involves a change in the position or location of something)
2. (8) gesture, motion -- (the use of movements (especially of the hands) to communicate familiar or prearranged signals)
3. (6) motion, movement, move, motility -- (a change of position that does not entail a change of location; "the reflex motion of his eyebrows revealed his surprise"; "movement is a sign of life"; "an impatient move of his hand"; "gastrointestinal motility")
4. (4) motion -- (a state of change; "they were in a state of steady motion")
5. (1) motion, question -- (a formal proposal for action made to a deliberative assembly for discussion and vote; "he made a motion to adjourn"; "she called for the question")
6. (1) motion, movement, move -- (the act of changing location from one place to another; "police controlled the motion of the crowd"; "the movement of people from the farms to the cities"; "his move put him directly in my path")
7. apparent motion, motion, apparent movement, movement -- (an optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object; "the cinema relies on apparent motion"; "the succession of flashing lights gave an illusion of movement")
Overview of verb motion
The verb motion has 1 sense (first 1 from tagged texts)
1. (1) gesticulate, gesture, motion -- (show, express or direct through movement; "He gestured his desire to leave")