Definify.com
Webster 1913 Edition
Octave
Oc′tave
,Noun.
1.
The eighth day after a church festival, the festival day being included; also, the week following a church festival.
“The octaves of Easter.” Jer. Taylor.
2.
(Mus.)
(a)
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.
(b)
The whole diatonic scale itself.
☞ The ratio of a musical tone to its octave above is 1:2 as regards the number of vibrations producing the tones.
3.
(Poet.)
The first two stanzas of a sonnet, consisting of four verses each; a stanza of eight lines.
With mournful melody it continued this
octave
. Sir P. Sidney.
4.
A small cask of wine, the eighth part of a pipe.
Oc′tave
,Adj.
Consisting of eight; eight.
Dryden.
Webster 1828 Edition
Octave
OC'TAVE
,Adj.
OC'TAVE
,Noun.
1.
The eighth day after a festival.2.
Eight days together after a festival.3.
In music, an eighth, or an interval of seven degrees or twelve semitones. The octave is the most perfect of the chords, consisting of six full tones and two semitones major. It contains the whole diatonic scale.