from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Music 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.
- n. Music A tone that is eight diatonic degrees above or below another given tone.
- n. Music Two tones eight diatonic degrees apart that are sounded together.
- n. Music The consonance that results when two tones eight diatonic degrees apart are sounded.
- n. Music A series of tones included within this interval or the keys of an instrument that produce such a series.
- n. Music An organ stop that produces tones an octave above those usually produced by the keys played.
- n. Music The interval between any two frequencies having a ratio of 2 to 1.
- n. Ecclesiastical The eighth day after a feast day, counting the feast day as one.
- n. Ecclesiastical The entire period between a feast day and the eighth day following it.
- n. A group or series of eight.
- n. A group of eight lines of poetry, especially the first eight lines of a Petrarchan sonnet. Also called octet.
- n. A poem or stanza containing eight lines.
- n. Sports A rotating parry in fencing.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An interval of twelve semitones spanning eight degrees of the diatonic scale, representing a doubling or halving in pitch.
- n. The pitch an octave higher than a given pitch.
- n. A poetic stanza consisting of eight lines; usually used as one part of a sonnet.
- n. The eighth defensive position, with the sword hand held at waist height, and the tip of the sword out straight at knee level.
- n. The day that is one week after a feast day in the Latin Rite of the Catholic Church.
- n. An eight day period beginning on a feast day in the Latin Rite of the Catholic Church.
- adj. Consisting of eight; eight in number.
from the GNU version of the Collaborative International Dictionary of English
- n. The eighth day after a church festival, the festival day being included; also, the week following a church festival.
- n. 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.
- n. The whole diatonic scale itself.
- n. The first two stanzas of a sonnet, consisting of four verses each; a stanza of eight lines.
- n. A small cask of wine, the eighth part of a pipe.
- adj. Consisting of eight; eight.
from The Century Dictionary and Cyclopedia
- n. 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. 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. 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. The interval between any tone and a tone on the eighth degree above or below it.
- n. The harmonic combination of two tones at the interval thus described.
- n. 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.
- n. 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.
- n. 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. Any interval resembling the musical octave in having the vibration-ratio of 1:2.
- n. Specifically, in versification: A stanza of eight lines; especially, the ottava rima (which see).
- n. The first two quatrains or eight lines in a sonnet. See sonnet.
- n. A small cask of wine containing the eighth part of a pipe.
- Consisting of eight; specifically, consisting of eight lines.
- To play in octaves.
- 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. In fencing, the eighth guard: point low, hand moving to the right.
- 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.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a feast day and the seven days following it
- n. a musical interval of eight tones
- n. a rhythmic group of eight lines of verse
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; see oktō(u) in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin octavus ("eighth"). (Wiktionary)