Pronunciation: (siksth),[key] —adj. 1. next after the fifth; being the ordinal number for six.
2. being one of six equal parts.
—n. 1. a sixth part, esp. of one (1/6).
2. the sixth member of a series.
3. Music. a. a tone on the sixth degree from a given tone (counted as a first).
b. the interval between such tones.
c. the harmonic combination of such tones.