OCTAVE

noun see: eight Date: 14th century an 8-day period of observances beginning with a festival day, 2. a stanza of eight lines ; ottava rima , the first eight lines of an Italian sonnet, 3. a musical interval embracing eight diatonic degrees, a tone or note at this interval, the harmonic combination of two tones an ~ apart, the whole series of notes, tones, or digitals comprised within this interval and forming the unit of the modern scale, an organ stop giving tones an ~ above those corresponding to the digitals, the interval between two frequencies (as in an electromagnetic spectrum) having a ratio of 2 to 1, a group of eight