Definitions of motion:

• noun:   the act of changing location from one place to another

  Example: "Police controlled the motion of the crowd"

• noun:   a change of position that does not entail a change of location

  Example: "The reflex motion of his eyebrows revealed his surprise"

• noun:   a formal proposal for action made to a deliberative assembly for discussion and vote

  Example: "He made a motion to adjourn"

• noun:   a state of change

  Example: "They were in a state of steady motion"

• noun:   the use of movements (especially of the hands) to communicate familiar or prearranged signals
• noun:   a natural event that involves a change in the position or location of something
• noun:   an optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object

  Example: "The cinema relies on apparent motion"

• verb:   show, express or direct through movement