having a thin cutting edge or a fine point; well-adapted for cutting or piercing

a sharp knife.

terminating in an edge or point; not blunt or rounded

The table had sharp corners.

involving a sudden or abrupt change in direction or course

a sharp curve in the road; The car made a sharp turn.

abrupt, as an ascent

a sharp drop.

consisting of angular lines and pointed forms or of thin, long features

He had a sharp face.

clearly defined; distinct

a sharp photographic image.

distinct or marked, as a contrast

sharp differences of opinion.

pungent or biting in taste

a sharp cheese.

piercing or shrill in sound

a sharp cry.

keenly cold, as weather

a sharp, biting wind.

felt acutely; intense; distressing

sharp pain.

merciless, caustic, or harsh

sharp words.

fierce or violent

a sharp struggle.

keen or eager

sharp desire.

quick, brisk, or spirited.

alert or vigilant

They kept a sharp watch for the enemy.

mentally acute

a sharp lad.

extremely sensitive or responsive; keen

sharp vision; sharp hearing.

shrewd or astute

a sharp bargainer.

shrewd to the point of dishonesty

sharp practice.

Music .

(of a tone) raised a chromatic half step in pitch

F sharp.

above an intended pitch, as a note; too high ( opposed to flat ).

Informal . very stylish

a sharp dresser; a sharp jacket.

Radio, Electronics . of, relating to, or responsive to a very narrow range of frequencies. Compare broadband .

Phonetics . fortis; voiceless.

composed of hard, angular grains, as sand.

Music . to raise in pitch, esp. by one chromatic half step.

to sound above the true pitch.

keenly or acutely.

abruptly or suddenly

to pull a horse up sharp.

punctually

Meet me at one o'clock sharp.

vigilantly.

briskly; quickly.

Music . above the true pitch

You're singing a little sharp.

something sharp.

Usually, sharps. a medium-length needle with a rounded eye and a sharp point, used for all-purpose hand sewing.

a sharper.

Informal . an expert.

Music .

a tone one chromatic half step above a given tone.

(in musical notation) the symbol ? indicating this.

noun

bite , incisiveness , keenness , sting