Octave Definition

ŏktĭv, -tāv
octaves
noun
octaves
The interval of eight diatonic degrees between two tones of the same name, the higher of which has twice as many vibrations per second as the lower.
American Heritage
The interval of seven diatonic degrees between a tone and either of its octaves.
Webster's New World
The eighth day following a church festival, counting the festival day as the first.
Webster's New World
The eighth tone of an ascending or descending diatonic scale, or a tone seven degrees above or below a given tone in such a scale.
Webster's New World
A position of thrust or parry in which the hand is rotated with the palm up.
Webster's New World
Synonyms:
adjective
Consisting of eight, or an octave.
Webster's New World
Producing tones an octave higher.
An octave key.
Webster's New World

Other Word Forms of Octave

Noun

Singular:
octave
Plural:
octaves

Origin of Octave

  • Middle English eighth day after a feast day from Old French from Medieval Latin octāva (diēs) from Latin feminine of octāvus eighth from octō eight oktō(u) in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin octavus (“eighth").

    From Wiktionary

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