An Etymological Dictionary of Astronomy and Astrophysics

1a) A successive group of rhythmical steps or bodily motions, or both, usually executed to music.

1b) An act or round of dancing.

2a) To move one’s feet or body, or both, rhythmically in a pattern of steps, especially to the accompaniment of music.

2b) To leap, skip, etc., as from excitement or emotion; move nimbly or quickly (Dictionary.com).

Etymology (EN): M.E. da(u)ncen “to dance,” from O.Fr. dancier of unknown origin, perhaps related to O.H.G. *dansjan “to lead (someone) to a dance.”

Etymology (PE): Vašt, variant of gašt, gardidan, gel, gelidan “to turn,” → revolve, cf.
Eastern Gilâni gilâr “dance.”