octave

IPA: ˈɑktɪv

(music) An interval of twelve semitones spanning eight degrees of the diatonic scale, representing a doubling or halving in pitch frequency.
(music) The pitch an octave higher than a given pitch.
(music) A coupler on an organ which allows the organist to sound the note an octave above the note of the key pressed (cf sub-octave)
(poetry) A poetic stanza consisting of eight lines; usually used as one part of a sonnet.
(fencing) The eighth defensive position, with the sword hand held at waist height, and the tip of the sword out straight at knee level.
(Christianity) The day that is one week after a feast day in the Latin rite of the Catholic Church.
(Christianity) An eight-day period beginning on a feast day in the Latin rite of the Catholic Church.
A small cask of wine, one eighth of a pipe.
(mathematics, obsolete) An octonion.
(signal processing) Any of a number of coherent-noise functions of differing frequency that are added together to form Perlin noise.
(astrology) The subjective vibration of a planet.

Examples of "octave" in Sentences

The same Mass has Dies Irae sung in octave alternation.
I call the octave, The Octave and the bowlback, The Bowlback.
Dies Irae was sung in octave alternatim by 250 people to create a beauty of enormous power.
The Chinese scale is now, as it always has been, one of five notes to the octave, that is to say, our modern major scale with the fourth and seventh omitted.
Note also that an octave is the difference between a harmonic and the adjacent harmonic (the frequency of one octave up is 2x the frequency of the fundamental).
Please clarify why the terms octave mandolin and mandola seem to be used interchangeably in Europe -- is this simply because they are the same size and scale length?
Please clarify why the terms octave mandolin and mandola seem to be used interchangeably in Europe -- is this simply because they are the same size and scale length? toddmakesnoise
The _one-lined octave_ may be described as the octave from _middle C_ to the B represented by the third line of the treble staff, and any tone within that octave is referred to as "one-lined."
James I., been moulded into an heroic poem in English octave stanza, or epic blank verse; -- which, however, at that time had not been invented, and which, alas! still remains the sole property of the inventor, as if the Muses had given him an unevadible patent for it.