waltz (n.) Look up waltz at Dictionary.com
dance performed to music in triple time, 1781, from German Waltzer, from walzen "to roll, dance," from Old High German walzan "to turn, roll," from Proto-Germanic *walt- (cf. Old Norse velta), from PIE root *wel- "to turn, revolve" (see vulva). Described in 1825 as "a riotous and indecent German dance."
waltz (v.) Look up waltz at Dictionary.com
1794, from waltz (n.). Meaning "to move nimbly" is recorded from 1862. Related: Waltzed; waltzing.