oc·tave /ˈɑktɪv, təv, ˌtev/
1. The eighth day after a church festival, the festival day being included; also, the week following a church festival. “The octaves of Easter.”
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.
Note: ☞ 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.
Double octave. Mus. See under Double.
Octave flute Mus., a small flute, the tones of which range an octave higher than those of the German or ordinary flute; -- called also piccolo. See Piccolo.
4. A small cask of wine, the eighth part of a pipe.
Oc·tave a. Consisting of eight; eight.
n 1: a feast day and the seven days following it
2: a musical interval of eight tones [syn: musical octave]
3: a rhythmic group of eight lines of verse