Octave

1. a. Consisting of eight; eight.
2. n. The eighth day after a church festival, the festival day being included; also, the week following a church festival.
3. n. 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.
4. n. The whole diatonic scale itself.
5. n. The first two stanzas of a sonnet, consisting of four verses each; a stanza of eight lines.
6. n. A small cask of wine, the eighth part of a pipe.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.