Definition of: sixth

(siksth) adjective
1. Next in order after the fifth.
2. Being one of six equal parts.
—noun
1. One of six equal parts.
2. Music a The interval between any note and the sixth note above or below it on the diatonic scale. b A note separated by this interval from any other, considered with reference to that other. c The sixth above the keynote. d Two notes at this interval written or sounded together, or the resulting consonance.
—chord of the sixth Music A chord consisting of a tone with its minor third and its sixth: also sixth chord.
—adverb In the sixth order, place, or rank: also, in formal discourse, sixth′ly. [OE sixta; refashioned to conform to fourth]