Source : Webster's Revised Unabridged Dictionary (1913)

Waltz \Waltz\, v. i. [imp. & p. p. {Waltzed}; p. pr. & vb. n.
   {Waltzing}.]
   To dance a waltz.

Waltz \Waltz\, n. [G. walzer, from walzen to roll, revolve,
   dance, OHG. walzan to roll; akin to AS. 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.

Source : WordNet®

waltz
     n 1: an assured victory (especially in an election) [syn: {walk-in}]
     2: music composed in triple time for waltzing
     3: a ballroom dance in triple time with a strong accent on the
        first beat [syn: {valse}]
     v : dance a waltz [syn: {waltz around}]