sharpest
adjective
Definitions
Terminating in a point or edge, especially one that can cut easily; not obtuse or rounded.
Example: A face with sharp features
Intelligent.
Example: My nephew is a sharp lad; he can count to 100 in six languages, and he's only five years old.
Higher than usual by one semitone (denoted by the symbol ♯ after the name of the note).
Higher in pitch than required.
Example: The orchestra's third violin several times was sharp about an eighth of a tone.