Meaning

noun an assured victory (especially in an election)

noun music composed in triple time for waltzing

noun a ballroom dance in triple time with a strong accent on the first beat

originFrom German Walzer, from walzen (“to dance”), from Old High German walzan (“to turn”), from Proto-Germanic *walt- (“to turn”), from Proto-Indo-European *welH- (“to turn”). Doublet of valse. More at *waltaną.

Etymology from Wiktionary, CC BY-SA 3.0