Music .

a tone on the eighth degree from a given tone.

the interval encompassed by such tones.

the harmonic combination of such tones.

a series of tones, or of keys of an instrument, extending through this interval.

a pipe-organ stop whose pipes give tones an octave above the normal pitch of the keys used.

a series or group of eight.

Also called octet. Prosody .

a group of eight lines of verse, esp. the first eight lines of a sonnet in the Italian form. Compare sestet ( def. 1 ) .

a stanza of eight lines.

the eighth of a series.

Ecclesiastical .

the eighth day from a feast day, counting the feast day as the first.

the period of eight days beginning with a feast day.

one eighth of a pipe of wine.

Fencing . the eighth of eight defensive positions.

pitched an octave higher.

noun

cask , eight , interval , note , scale , tone