octave Definition

1. Any group or series of eight.
2a. music.
The range of sound, or the series of notes, between the first and the eighth notes of a major or minor scale, eg from C to the C above;
2b. music.
A musical note that is an eighth above or below another.
3. An organ stop sounding an octave higher than the ordinary pitch.
4a. poetry.
A verse or stanza with eight lines;
Form: octet (also)
4b. poetry.
The first eight lines of a sonnet.
Form: octet (also)
5a. The eighth day (when counted inclusively) after a church festival;
5b. The eight days from a festival to its octave.
6a. fencing.
The eighth of eight basic parrying positions;
6b. fencing.
A parry made in this position.