Waltz n. : 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 v. i. : To dance a waltz.

Example:
Is the classic Waltz sweeping the nation and at congressional parties?

Taxonomy
waltz, dance, Dance Index, the Waltz, ballroom dance, Ballet Caravan, couples, Vienna, dancers, Palm family, Nettl, Paul, Index vol, New York, Jacob, free encyclopedia, Musicians, ballroom.

Defination from the web:
waltz and its different variants. ... a halt on the standing foot during the full waltz measure, with the moving foot suspended in the air or ... International Standard Waltz has only closed figures; that is, the couple never leaves closed position. ...