Webster's Revised Unabridged Dictionary · 1913

Waltz

Waltz , noun

[German walzer, from walzen to roll, revolve, dance, Old High German walzan to roll; akin to Anglo-Saxon wealtan. See Welter.]

A dance performed by two persons in circular figures with a whirling motion; also, a piece of music composed in triple measure for this kind of dance.

Waltz , intransitive verb

To dance a waltz.