plural octaves
music
: the difference in sound between the first and eighth note on a musical scale
He sang the song an octave lower.
The two tones are (spaced) an octave apart.
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“Octave.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/octave. Accessed 19 Jun. 2026.
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