alphabet

octave

Definition of octave:

part of speech: noun

In music, the longest interval in the diatonic scale, as from do to do, or from C to C; seven keys on a pianoforte; a small cask for wine, being the eighth part of a pipe; eight days, or the eighth day, after a Church festival, the festival being included.

part of speech: adjective

Consisting of eight.

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