• WordNet 3.6
    • n octave a rhythmic group of eight lines of verse
    • n octave a musical interval of eight tones
    • n octave a feast day and the seven days following it
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Webster's Revised Unabridged Dictionary
    • Octave A small cask of wine, the eighth part of a pipe.
    • a Octave Consisting of eight; eight.
    • Octave The eighth day after a church festival, the festival day being included; also, the week following a church festival. "The octaves of Easter."
    • Octave (Mus) The eighth tone in the scale; the interval between one and eight of the scale, or any interval of equal length; an interval of five tones and two semitones.
    • Octave (Poet) The first two stanzas of a sonnet, consisting of four verses each; a stanza of eight lines. "With mournful melody it continued this octave ."
    • Octave (Mus) The whole diatonic scale itself.
    • ***
Century Dictionary and Cyclopedia
    • n octave The eighth day from a festival, the feast-day itself being counted as the first: as, Low Sunday is the octave of Easter. The octave necessarily falls on the same day of the week as the feast from which it is counted.
    • n octave The prolongation of a festival till the eighth day inclusive; a period consisting of a feastday and the seven days following: as, St. John the Evangelist's day (December 27th) is within the octave of Christmas. See outas.
    • n octave In music: A tone on the eighth diatonic degree above or below a given tone; the next higher or lower replicate of a given tone.
    • n octave The interval between any tone and a tone on the eighth degree above or below it.
    • n octave The harmonic combination of two tones at the interval thus described.
    • n octave In a scale, the eighth tone from the bottom, or, more exactly, the tone with which the repetition of the scale begins; the upper key-note or tonic; the eighth: solmizated do, like the lower key-note. The typical interval of an octave is that between any tone and its next replicate, which is acoustically represented by the ratio 1:2 — that is, in number of vibrations — and is equal to six diatonic whole steps or to twelve semitones. Such an octave is called perfect or major; an octave one halfstep shorter is called diminished or minor; an octave one half-step longer is called augmented. The perfect octave is the most complete consonance after the unison. Indeed, its completeness is often regarded as belonging to a different category from that of the other perfect consonances, except the unison, since it amounts rather to a repetition or reinforcement of the original tone at a higher or lower pitch than to a combination of a new or different tone with it: hence the term replicate. In harmony the parallel motion of two voice-parts in perfect octaves is forbidden, except where the mere reinforcement of one voice by another is desired: such octaves are called consecutive octaves. See consecutive intervals, under consecutive.
    • n octave In a standard system of tones selected for artistic use, a division or section or group of tones an octave long, the limits of which are fixed by reference to a given or assumed standard tone whose exact pitch may be defined. The tone usually assumed as a starting-point is middle C (written on the first leger line below in the treble clef, and on the first above in the bass clef). The octave beginning on the next C below is called the tenor or small octave; that beginning on the second C below is called the bass or great octave; that beginning on the third C below is called the contrabass octave; while that beginning on middle C itself is called the alto, once-marked, or once-accented octave; that beginning on the next C above is called the treble, twice-marked, or twice-accented octave, etc. See the accompanying table: The acceptance of the octave as the best unit for thus dividing the series of recognized tones into sections of equal length and value has not been uniform. Ancient Greek music seems to have first used the tetrachord as such a unit; while medieval music employed the hexachord in the same way. The subdivision of the octave portions themselves has also varied greatly in different systems of music. See scale.
    • n octave In organ-building, a stop whose pipes give tones an octave above the normal pitch of the digitals used; specifically, such a stop of the diapason variety. Also known as the principal. Also called octave-flute, octavestop.
    • n octave Any interval resembling the musical octave in having the vibration-ratio of 1:2.
    • n octave Specifically, in versification: A stanza of eight lines; especially, the ottava rima (which see).
    • n octave The first two quatrains or eight lines in a sonnet. See sonnet.
    • n octave A small cask of wine containing the eighth part of a pipe.
    • octave Consisting of eight; specifically, consisting of eight lines.
    • octave To play in octaves.
    • octave In pianoforte- and harpsichordmaking, to reinforce the tone of a digital by adding a string tuned an octave above the usual tone of the digital.
    • n octave In fencing, the eighth guard: point low, hand moving to the right.
    • octave In music, noting a tone, note, instrument, organ-stop, etc., whose pitch is an octave above the ordinary pitch or any pitch taken for reference: as, the piccolo is an octave flute.
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Chambers's Twentieth Century Dictionary
    • adj Octave ok′tāv eight: consisting of eight
    • n Octave an eighth: that which consists of eight: the eighth day after a church festival, counting the feast-day itself as the first: the period between a festival and its octave:
    • n Octave (mus.) an eighth, or an interval of twelve semitones: the eighth part of a pipe of wine
    • ***


Webster's Revised Unabridged Dictionary
F., fr. L. octava, an eighth, fr. octavus, eighth, fr. octo, eight. See Eight, and cf. Octavo Utas


In literature:

The Nativity, &c., are celebrated for eight days, which is the octave.
"Notes and Queries, Number 33, June 15, 1850" by Various
It was soon observable that Creed Bonbright's presence caused Huldah Spiller's spirits to mount several notes in the octave.
"Judith of the Cumberlands" by Alice MacGowan
The pages of an octave book, commencing at page 1, are shown at fig.
"Bookbinding, and the Care of Books" by Douglas Cockerell
Anatole France is a philosophical anarchist, and so is Octave Misbeau.
"An Anarchist Woman" by Hutchins Hapgood
Concerning Harmonics, Octaves, etc.
"The Repairing & Restoration of Violins" by Horace Petherick
He writes in octaves, striking instinctively all the chords of humour, tragedy, pathos and romance with either hand.
"When Winter Comes to Main Street" by Grant Martin Overton
The three drones are usually tuned to A, the two smallest one octave below the A of the chaunter, and the largest two octaves below.
"Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2" by Various
If there are no more degrees to reach, the whole scale is run through again an octave higher, so to speak.
"Two Years with the Natives in the Western Pacific" by Felix Speiser
Thirteen minutes long by the clock, with a range of ten octaves!
"David and the Phoenix" by Edward Ormondroyd
His voice ranges within a semitone of two octaves.
"Music and Some Highly Musical People" by James M. Trotter

In poetry:

I think and write not as I did before;
And with their song of earth, entire
Freed territories add their mighty voice,
A booming octave in a choir.
"Spring" by Boris Pasternak
The first was a bottle-fly, big and blue,
The second was smaller, and thin and long;
So there was a concert between the two,
Like an octave flute and a tavern gong.
"The Stethoscope Song. A Professional Ballad" by Oliver Wendell Holmes
Oh! bring it, and sing it -- its notes are tears;
Its octaves, the octaves of grief;
Who knows but its tones in the far-off years
May bring to the lone heart relief?
"A Song" by Abram Joseph Ryan
Structures of steel welded, subtily tempered,
Marvelous wrought of the wizards of ore,
Torn into octaves discordantly clashing,
Chords never final but onward progressing
In monstrous fusion of sound ever smiting on sound in mad vortices whirling…
"The Song Of Iron" by Lola Ridge

In news:

At the touch of a button, the tiny Octave Multipod 5 in 1 morphs into a video recorder, digital camera, 128MB storage drive, voice recorder, or webcam.
OCTAVE' Study Will Assess ColoAd1 in Patients with Ovarian Cancer.
Yma Sumac, 'Peruvian songbird ' with multi-octave range, dies at 86.
Yma Sumac, 'Peruvian songbird' with multi-octave range, dies at 86.
Yma Sumac , 'Peruvian songbird' with multi-octave range, dies at 86.
Swirling, fleet flamenco guitar work meets modern dance rhythms on La Esperanza (Higher Octave HOMCD 46227.
It may take a big spoonful of sugar to make this go down: Julie Andrews says that her four-octave voice is not coming back.
Julie Andrews says her four-octave voice isn't coming back.
0The Truman State University Cantoria choir held its 47th Pancake Day on Saturday, but what began as a simple fundraiser, appeared rise in octaves.
NEW YORK — It may take a big spoonful of sugar to make this go down: Julie Andrews says that her four-octave voice is not coming back .
Octaves Offer Free Download of "Fix the Fernback".
Octaves Offer Free Download of " Fix the Fernback".
Octave Chanute and the Transportation Revolution.
Stout plays three octaves which totals 37 bells.
Babies who can sing the Beatles, men with nine-octave ranges -- simply put, the most talented people in the world are found on YouTube.

In science:

With the division of an octave into 12 semitones, intervals may also be defined by number of semitones between the two tones.
Music in Terms of Science
The inversions of a chord do not alter the harmonic effect of it, because a tone sounds the same as its octave.
Music in Terms of Science
Those above octave can also be considered as a tone within an octave of one octave higher.
Music in Terms of Science
For example, the ninth is a second of one octave higher.
Music in Terms of Science
C-flat to three and a half octaves above, usually ending on G-sharp.
Music in Terms of Science