"a step in dancing," a French word in English, 1775, from French pas "a step, track,… See origin and meaning of pas.
completed movement in walking," from Old Frenchpas"a step, pace, trace," and directly from Latinpassus,passum"a step, pace, stride," noun use of past participle ofpandere"to stretch (the leg), spread out," probably from PIE*pat-no-, nasalized variant form of root*pete-"to spread....