·adj Consisting of eight; eight.
II. Octave ·noun The whole diatonic scale itself.
III. Octave ·noun A small cask of wine, the eighth part of a pipe.
IV. Octave ·noun The first two stanzas of a sonnet, consisting of four verses each; a stanza of eight lines.
V. Octave ·noun The eighth day after a church festival, the festival day being included; also, the week following a church festival.
VI. Octave ·noun 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.