octave
octave. Interval of 8 notes, counting bottom and top notes. Notes an octave apart have same letter-names. Interval from, say, D to next D above is perfect octave; from D up to D♭ and from D up to D♯ are diminished and augmented octaves respectively. Also double octave, 2 octaves; at the octave, to be perf. octave higher than written; in octaves, to be perf. with each note doubled one or more octaves above or below.
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NEARBY TERMS
octave
