a series of eight notes occupying the interval between (and including) two notes, one having twice or half the frequency of vibration of the other, a tone on the eighth degree from a given tone (counting the keynote as the first)

perfect octave, octave leap, octave range

Formal and Informal Expressions of octave

In different contexts, you can replace 'octave' with suitable alternatives. In a more formal setting, 'interval, tone' is apt. In informal speech or writing, 'note, pitch' is a commonplace synonym.

octave: Explore its Definition & Usage

octave Definition

1a series of eight notes occupying the interval between (and including) two notes, one having twice or half the frequency of vibration of the other
2a tone on the eighth degree from a given tone (counting the keynote as the first)

Using octave: Examples

Take a moment to familiarize yourself with how "octave" can be used in various situations through the following examples!

Example
The melody spans an octave and a half.
Example
She sang the song in a high octave.
Example
The piano has 88 keys, spanning seven octaves and three notes.

octave Synonyms and Antonyms

Synonyms for octave

Phrases with octave

perfect octave
an octave in which the higher note has exactly twice the frequency of the lower note
Example
The perfect octave is a fundamental interval in Western music.
octave leap
a melodic interval of an octave or more
Example
The song features an octave leap in the chorus.
octave range
the span of notes that can be produced within an octave
Example
Her voice has an impressive octave range.

Origins of octave

from Latin 'octava', meaning 'eighth'

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Summary: octave in Brief

An 'octave' [ˈɒktɪv] refers to a series of eight notes or a tone on the eighth degree from a given tone. It is a fundamental interval in Western music, with phrases like 'perfect octave' and 'octave leap.' The term also encompasses 'octave range,' which describes the span of notes that can be produced within an octave.