octave

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noun oc·tave \ˈäk-tiv, -təv, -ˌtāv\

Definition of octave

  1. 1 :  an 8-day period of observances beginning with a festival day

  2. 2a :  a stanza of eight lines :  ottava rimab :  the first eight lines of an Italian sonnet

  3. 3a :  a musical interval embracing eight diatonic degreesb :  a tone or note at this intervalc :  the harmonic combination of two tones an octave apartd :  the whole series of notes, tones, or digitals comprised within this interval and forming the unit of the modern scalee :  an organ stop giving tones an octave above those corresponding to the keys

  4. 4 :  the interval between two frequencies (as in an electromagnetic spectrum) having a ratio of 2 to 1

  5. 5 :  a group of eight

Examples of octave in a Sentence

  1. He sang the song an octave lower.

Origin and Etymology of octave

Middle English, from Anglo-French, from Medieval Latin octava, from Latin, feminine of octavus eighth, from octo eight — more at eight


First Known Use: 14th century


OCTAVE Defined for English Language Learners

octave

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noun oc·tave \ˈäk-tiv, -təv, -ˌtāv\

Definition of octave for English Language Learners

  • music : the difference in sound between the first and eighth note on a musical scale


OCTAVE Defined for Kids

octave

play
noun oc·tave \ˈäk-tiv\

Definition of octave for Students

  1. 1 :  a space of eight steps between musical notes

  2. 2 :  a tone or note that is eight steps above or below another note or tone



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