chaconne

< /ʃæˈkɔnz, -ˈkɒnz, ʃɑ-; French ʃaˈkɔn/.

1. an ancient dance, probably of Spanish origin, in moderate triple meter.
2. a musical form based on the continuous variation of a series of chords or of a ground bass.

noun

1. a musical form consisting of a set of continuous variations upon a ground bassSee also passacaglia
2. archaic a dance in slow triple time probably originating in Spain