1. (noun) gesture, motion
the use of movements (especially of the hands) to communicate familiar or prearranged signals
2. (noun) movement, motion
a natural event that involves a change in the position or location of something
3. (noun) 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. (noun) motion
a state of change
"they were in a state of steady motion"
5. (noun) 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. (noun) 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. (verb) 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"
8. (verb) gesticulate, gesture, motion
show, express or direct through movement
"He gestured his desire to leave"
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Definition of 'motion' 
