Text: (1) The sign # which raises a note one semitone above the normal or natural scale. A note so affected is restored to its normal pitch by the use of a natural sign. In old music sharps were often used to raise notes which had been previously flattened, for which purpose a natural is always used today. (2) An augmented interval is said by some to be a sharp. In old writers a major third is called a sharp third. (3) Out of tune, by being higher in pitch than is just. (4) Shrill or acute, as sharp mixture, an organ stop.

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