Meaning

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 a change of position that does not entail a change of location

originInherited from Middle English mocioun, mocion, from Anglo-Norman motion, Middle French motion, and their etymon Latin mōtiō (“movement, motion”), related to movēre, from Proto-Indo-European *m(y)ewh₁- (“to move”).

Etymology from Wiktionary, CC BY-SA 3.0