sharp

Terminating in a point or edge, especially one that can cut easily; not dull, obtuse, or rounded.

“I keep my knives sharp so that they don't slip unexpectedly while carving.”

“Ernest made the pencil too sharp and accidentally stabbed himself with it.”

colloquialIntelligent.

“My nephew is a sharp lad; he can count to 100 in six languages, and he's only five years old.”

musicHigher than usual by one semitone (denoted by the symbol ♯ after the name of the note).

musicHigher in pitch than required.

“The orchestra's third violin several times was sharp about an eighth of a tone.”

Having an intense, acrid flavour.

“Milly couldn't stand sharp cheeses when she was pregnant, because they made her nauseated.”

Sudden and intense.

“A pregnant woman during labor normally experiences a number of sharp contractions.”

colloquialIllegal or dishonest.

“Michael had a number of sharp ventures that he kept off the books.”

colloquialKeenly or unduly attentive to one's own interests; shrewd.

“a sharp dealer;  a sharp customer”

Exact, precise, accurate; keen.

“You'll need sharp aim to make that shot.”

Offensive, critical, or acrimonious.

“sharp criticism”

“When the two rivals met, first there were sharp words, and then a fight broke out.”

colloquialStylish or attractive.

“You look so sharp in that tuxedo!”

Observant; alert; acute.

“Keep a sharp watch on the prisoners. I don't want them to escape!”

Forming a small angle; especially, forming an angle of less than ninety degrees.

“Drive down Main for three quarters of a mile, then make a sharp right turn onto Pine.”

Steep; precipitous; abrupt.

“a sharp ascent or descent; a sharp turn or curve”

To a point or edge; piercingly; eagerly; sharply.

notcompExactly.

“I'll see you at twelve o'clock sharp.”

musicIn a higher pitch than is correct or desirable.

“I didn't enjoy the concert much because the tenor kept going sharp on the high notes.”

Changing suddenly in direction and degree

“the road twists sharply after the light”

“turn sharp left here”

“the visor was acutely peaked”

musicThe symbol ♯, placed after the name of a note in the key signature or before a note on the staff to indicate that the note is to be played a semitone higher.

“The pitch pipe sounded out a perfect F♯ (F sharp).”

“Transposition frequently is harder to read because of all the sharps and flats on the staff.”

musicA note that is played a semitone higher than usual; denoted by the name of the note that is followed by the symbol ♯.

musicA note that is sharp in a particular key.

“The piece was difficult to read after it had been transposed, since in the new key many notes were sharps.”

musicThe scale having a particular sharp note as its tonic.

“Beethoven's "Moonlight Sonata" is written in C♯ minor (C sharp minor.)”

usually in the pluralSomething that is sharp.

“Place sharps in the specially marked red container for safe disposal.”

medicineA hypodermic syringe.

psychiatryhealthcareA sharp object; any item pointed enough to injure human skin.

A dishonest person; a cheater.

“The casino kept in the break room a set of pictures of known sharps for the bouncers to see.”

“This usage is often classified as variant spelling of shark, and unrelated to the 'pointed' or 'cutting' meanings of sharp.”

Part of a stream where the water runs very rapidly.

A sewing needle with a very slender point, more pointed than a blunt or a between.

Fine particles of husk mixed with coarse particle of flour of cereals; middlings.

A sharpie (member of Australian gangs of the 1960s and 1970s).

A musical notation indicating one half step higher than the note named

musicTo raise the pitch of a note half a step making a natural note a sharp.

“That new musician must be tone deaf: he sharped half the notes of the song!”

To play tricks in bargaining; to act the sharper.