sharp(adjective)

having a thin edge that can cut or a point that can pierce

a sharp knife.

sharp(adverb)

punctually

Come at six (o'clock) sharp.

sharp(noun)

a sharp note

sharps and flats.

sharp(adjective)

(of pictures, outlines etc) clear and distinct

the sharp outline of the mountain.

sharp(adverb)

with an abrupt change of direction

Turn sharp left here.

sharp(noun)

a sign (#) to show that a note is to be raised a semitone.

sharp(adjective)

(of changes in direction) sudden and quick

a sharp left turn.

sharp(adverb)

at too high a pitch

You're singing sharp.

sharp(adjective)

(of pain etc) keen, acute or intense

He gets a sharp pain after eating.

sharp(adjective)

(often with with ) severe

Don't be so sharp with the child!; She got a sharp reproach from me.

sharp(adjective)

alert

Dogs have sharp ears.

sharp(adjective)

shrill and sudden

a sharp cry.

sharp(adjective)

of a musical note, raised a semitone; too high in pitch

F sharp; That last note was sharp.