sharp.

Terminating in a point or edge, especially one that can cut or pierce 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.

Intelligent.

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

Raised by one semitone (denoted by the symbol ⟨♯⟩ after the name of the note).

Higher in pitch than required.

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

Having a strong acrid or acidic taste.

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

This grapefruit is especially sharp.

Sudden, abrupt, intense, rapid.

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

The man turned and made a sharp movement towards the door.

Illegal or dishonest.

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

Keenly or unduly attentive to one's own interests; shrewd, verging on dishonest.

a sharp dealer, a sharp customer, sharp practice

Exact, precise, accurate; keen.

You'll need sharp aim to make that shot.

Offensive, critical, or acrimonious; stern or harsh.

sharp criticism

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

Stylish, smart 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!

Quick and alert.

Jones, the centre forward, made a sharp start to the game.

Strongly distinguishing or differentiating; acute.

a sharp contrast, a sharp distinction

Forming a small or tight 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.

a sharp turn or curve

Steep; precipitous; abrupt.

a sharp ascent or descent

Said of as extreme a value as possible.

Sure, any planar graph can be five-colored. But that result is not sharp: in fact, any planar graph can be four-colored. That is sharp: the same can't be said for any lower number.

Tactical; risky.

Piercing; keen; severe; painful.

a sharp pain; the sharp and frosty winter air

Eager or keen in pursuit; impatient for gratification.

a sharp appetite

Fierce; ardent; fiery; violent; impetuous.

Composed of hard, angular grains; gritty.

Uttered in a whisper, or with the breath alone; aspirated; unvoiced.

Hungry.

In a sharp manner: a less usual alternative to sharply in certain senses. To a point or edge.

In a sharp manner: a less usual alternative to sharply in certain senses. Piercingly.

In a sharp manner: a less usual alternative to sharply in certain senses. Eagerly.

In a sharp manner: a less usual alternative to sharply in certain senses. So as to make a sharp, or tight, angle.

Exactly.

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

In a higher pitch than is correct or desirable.

I didn't enjoy the concert much because the soprano sang sharp on all the high notes.

The 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 one chromatic 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.

A note that is played one chromatic semitone higher than usual; denoted by the name of the note that is followed by the symbol ⟨♯⟩.

A 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.

The scale having a particular sharp note as its tonic.

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

Something that is sharp.

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

Something that is sharp. A hypodermic syringe.

Something that is sharp. A scalpel or other edged instrument used in surgery.

Something that is sharp. A 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.

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.

An expert.

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

Alternative form of sharpie (“type of fishing boat”).

To 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.

To sharpen.