n.
Function: noun
Date: 14th century
: one that is sharp: as a : a sharp edge or point b (1) : a musical note or tone one half step higher than a note or tone named (2) : a character ♯ on a line or space of the musical staff indicating a pitch a half step higher than the degree would indicate without it c : a needle with a small eye for sewing by hand d : a real or self-proclaimed expert also : SHARPER