Definition of octaves:
(n) :
(music) An interval of twelve semitones spanning eight degrees of the diatonic scale, representing a doubling or halving in pitch frequency.
(n) :
(music) The pitch an octave higher than a given pitch.
(n) :
(poetry) A poetic stanza consisting of eight lines; usually used as one part of a sonnet.
(n) :
(Christianity) An eight-day period beginning on a feast day in the Latin rite of the Catholic Church.
(n) :
(Christianity) The day that is one week after a feast day in the Latin rite of the Catholic Church.
(n) :
(fencing) The eighth defensive position, with the sword hand held at waist height, and the tip of the sword out straight at knee level.