sharp 
(shärp)
(shärp)adj. sharp·er, sharp·est
1. Having a thin edge or a fine point suitable for or capable of cutting or piercing.
2.
a. Having clear form and detail: a sharp photographic image.
b. Terminating in an edge or a point: sharp angular cliffs; a sharp nose.
c. Clearly and distinctly set forth: sharp contrasts in behavior.
3. Abrupt or acute: a sharp drop; a sharp turn.
4.
a. Intellectually penetrating; astute: was sharp in his analysis of the problem.
b. Marked by keenness and accuracy of perception: sharp hearing.
5. Crafty or deceitful, as in business dealings: sharp selling practices.
6. Vigilant; alert: kept a sharp lookout for shoplifters.
7.
a. Briskly or keenly cold and cutting: a sharp wind.
b. Harsh or biting in tone or character: sharp criticism.
8. Fierce or impetuous; violent: a sharp temper; a sharp assault.
9. Intense; severe: a sharp pain.
10.
a. Sudden and shrill: a sharp whistle.
b. Sudden and brilliant or dazzling: a sharp flash of lightning.
11. Strongly affecting the senses of smell and taste: a sharp pungent odor; a sharp cheese.
12. Composed of hard angular particles: sharp sand.
13. Music
a. Raised in pitch by a semitone.
b. Being above the proper pitch.
c. Having the key signature in sharps.
14. Informal Attractive or stylish: a sharp jacket.
adv.
1. In a sharp manner: hit me sharp on the brow.
2. Punctually; exactly: at three o'clock sharp.
3. Music Above the true or proper pitch.
n.
1. Music
a. A sign (♯) used to indicate that a note is to be raised by a semitone.
b. A note that is raised a semitone.
2.
a. A slender sewing needle with a very fine point.
b. A hypodermic needle: a canister for disposing of used sharps.
3. Informal
a. An expert.
b. A shrewd cheater; a sharper.
v. sharped, sharp·ing, sharps
Music
Music
v.tr.
To raise in pitch by a semitone.
v.intr.
To play or sing above the proper pitch.
[Middle English, from Old English scearp; see sker-1 in the Appendix of Indo-European roots.]
sharply adv.
sharpness n.
Synonyms: sharp, keen1, acute
These adjectives all apply literally to fine edges, points, or tips. Figuratively they indicate mental alertness and clarity of comprehension. Sharp suggests quickness and astuteness: "a young man of sharp and active intellect" (John Henry Newman).
Keen implies clear-headedness and acuity: a journalist with a keen mind and quick wits.
Acute suggests penetrating perception or discernment: an acute observer of national politics. See Also Synonyms at fashionable.
These adjectives all apply literally to fine edges, points, or tips. Figuratively they indicate mental alertness and clarity of comprehension. Sharp suggests quickness and astuteness: "a young man of sharp and active intellect" (John Henry Newman).
Keen implies clear-headedness and acuity: a journalist with a keen mind and quick wits.
Acute suggests penetrating perception or discernment: an acute observer of national politics. See Also Synonyms at fashionable.