Octave

1.

The eighth day after a church festival, the festival day being included; also, the week following a church festival.

2.

The eighth tone in the scale; the interval between one and eight of the scale, or any interval of equal length; an interval of five tones and two semitones.

3.

The whole diatonic scale itself.

4.

The first two stanzas of a sonnet, consisting of four verses each; a stanza of eight lines.

5.

A small cask of wine, the eighth part of a pipe.

1.

Consisting of eight; eight.