Definition of sharp :
1. A portion of a stream where the water runs very rapidly.
2. A sewing needle having a very slender point; a needle of the most pointed of the three grades, blunts, betweens, and sharps.
3. A sharp tone or note.
4. A sharp tool or weapon.
5. Affecting the sense as if pointed or cutting, keen, penetrating, acute: to the taste or smell, pungent, acid, sour, as ammonia has a sharp taste and odor; to the hearing, piercing, shrill, as a sharp sound or voice; to the eye, instantaneously brilliant, dazzling, as a sharp flash.
6. An expert.
7. Composed of hard, angular grains; gritty; as, sharp sand.
8. Cutting in language or import; biting; sarcastic; cruel; harsh; rigorous; severe; as, a sharp rebuke.
9. Eager in pursuit; keen in quest; impatient for gratification; keen; as, a sharp appetite.
10. Fierce; ardent; fiery; violent; impetuous.
11. Having a very thin edge or fine point; of a nature to cut or pierce easily; not blunt or dull; keen.
12. High in pitch; acute; as, a sharp note or tone.
13. Keenly or unduly attentive to one's own interest; close and exact in dealing; shrewd; as, a sharp dealer; a sharp customer.
14. Of keen perception; quick to discern or distinguish; having nice discrimination; acute; penetrating; sagacious; clever; as, a sharp eye; sharp sight, hearing, or judgment.
15. Precisely; exactly; as, we shall start at ten o'clock sharp.
16. Raised a semitone in pitch; as, C sharp ( C), which is a half step, or semitone, higher than C.
17. So high as to be out of tune, or above true pitch; as, the tone is sharp; that instrument is sharp. Opposed in all these senses to flat.
18. Steep; precipitous; abrupt; as, a sharp ascent or descent; a sharp turn or curve.
19. Terminating in a point or edge; not obtuse or rounded; somewhat pointed or edged; peaked or ridged; as, a sharp hill; sharp features.
20. The character  used to indicate that the note before which it is placed is to be raised a half step, or semitone, in pitch.
21. To a point or edge; piercingly; eagerly; sharply.
22. To play tricks in bargaining; to act the sharper.
23. To raise above the proper pitch; to elevate the tone of; especially, to raise a half step, or semitone, above the natural tone.
24. To sharpen.
25. To sing above the proper pitch.
26. Uttered in a whisper, or with the breath alone, without voice, as certain consonants, such as p, k, t, f; surd; nonvocal; aspirated.
27. Very trying to the feelings; piercing; keen; severe; painful; distressing; as, sharp pain, weather; a sharp and frosty air.
dissimilar, smart-alecky, impassable, neat, penetrating, salient, riotous, mordacious, serrated, usual, heady, edgy, deeply, back, discriminating, slashing, mordant, con brio, astutely, burning, smarting, frizzly, fiery, just-in-time, nippy, flavored, big, stinging, snappy, identifiable, two-way, delicate, bully, chilling, hard-boiled, pulmonary, breathless, perceptive, smart-mouthed, whetted, needlelike, chord, affective, stropped, forceful, punctual, trig, loud, trenchant, subtile, clear-sighted, fast, definite, spruce, sensitive, developmental, vitriolic, lemony, sagaciously, different, shady, duly, swell, ground, swanky, great, groovy, guileful, contemporary, in, funky, frozen, resounding, diverse, futuristic, distinct, bar line, bass clef, contrasting, conniving, shifty, academic, unambiguous, perceptible, incisive, dandy, ability, do, exquisite, black ice, hard, scratching, biting, away, clef, crisply, deafening, put out, precipitant, dull, dishonest, kinky, dashing, style, calculative, cuspated, mod, beat, cracking, hasty, unscrupulous, plain, backward, carnassial, disconnected, acuate, evolutionary, rogue, visible, knifelike, arr., harmonious, andante, around, ear-splitting, corking, obvious, mucronate, underhanded, unprincipled, clear, acicular, icicle, glare ice, slow, achy, about, unmistakable, sardonic, sapiently, belligerent, bittersweet, two-edged, apparent, against, down, swish, annoyed, various, briery, untruthful, trendy, frost, aciculate, atonal, bar, strident, cuspate, indrawn, feeder, terse, exclusive, posh, drastic, advanced, stabbing, modernistic, peachy, lancinate, hyperintelligent, modish, bluesy, acerb, harmonic, duplicitous, bang-up, on the dot, laconic, happening, noisy, precipitously, state-of-the-art, unpleasant, tapering, one-way, lemonlike, nappy, nimble, ahead of your/its etc. time, major, nipping, angry, spired, outside, razor-sharp, frizzy, edged, cross, radically, agonising, D, shrill, strong, hardheaded, bass, bent, crotchet, crippling, in time, stylish, ice over, adagio, tonic, divergent, slap-up, shrewdly, acidulous, piercing, clear-eyed, space-age, classy, chocolatey, unlike, double-edged, shooting, swank, double-dealing, acutely, cosmetic, fraudulent, displeased, bad, bronchial, cuspidated, able, tight, sharp-witted, sharpened, peaked, satiric, mad, audible, well-timed, supersmart, noticeable, chocolate, uproarious, underhand, corrupt, corrosive, minor, diatonic, deceitful, depth, promptly, heavily, brackish, smashing, casual, radical, C, crooked, crispy, aciculated, chapped, can't hear yourself think, acid, con amore, nifty, natty, tony, arterial, tipped, flat, snarky, acoustic, chromatic, respect, up-to-the-minute, gradual, acuminate, allegro, means, modern, scathing, dapper, zesty, upset, classical, discordant, hip, taste, gradually, alternative, fulgurating, gnawing, savvy, quicksilver, sharply, blind, scalding, deep-seated, up, penetrative, cuspidate, salt, show up, double flat, au courant, steep, choke, B, overhasty, high-pitched, supercool, exceptional, chill, onward, labored, ultrasmart, sudden, A, passable, explicit, with-it, not bad, probing, truculent, sharp-worded, lancinating, left-handed, smart-aleck, attack, honest, unequivocal, manifest, irritated, prompt, voguish, precipitate, discerning, chesty, fresh, aggressively, high, precipitous, conflicting, honed, sourish, agonizing, dubious, deep, fed up, deceptive, chronic
attentive (part of speech: adjective)
careful, cautious, mindful, diligent, considering, enraptured, alert, fascinated, hearkening, rapt, watchful, heedful, concerned, observing, immersed, engrossed, scrutinizing, concentrating, intent, observant, regardful, responsible, vigilant, interested, absorbed, entranced, attentive
vigorous (part of speech: adjective)
intelligent (part of speech: adjective)
sour (part of speech: adjective)
pungent (part of speech: adjective)
severe (part of speech: adjective)
demanding, relentless, austere, fundamental, gruff, rigid, brusque, dry, uncompromising, piquant, curt, oppressive, correct, brisk, chilly, obdurate, icy, stiff-necked, bleak, meticulous, disciplined, cutting, spare, stringent, hidebound, blunt, caustic, censorious, keen, cool, tart, exacting, basic, acute, severe, ascetic, acerbic, imperial, puritanical, astringent, precise, lean, rigorous, frosty, Spartan, Draconian, harsh, acrimonious, unbending, intense, prudish, obstinate, intolerant, critical, authoritarian, short, abrupt, strict, stern, raw, stark, inflexible, crisp, grim, strait-laced, dour
witty (part of speech: adjective)
foxy, scurrilous, cunning, crafty, sarcastic, artful, jocular, deft, inventive, quick, urbane, shrewd, sparkling, facetious, intelligent, funny, subtle, droll, waggish, sophisticated, scintillating, witty, comical, clever, canny, sly, resourceful, brilliant, wily, ingenious, adroit, smart, joking, quick-witted, pithy, tricky, astute
stylish (part of speech: adjective)
sharp (part of speech: adjective)
vigilant (part of speech: adjective)
cunning (part of speech: adjective)
excellent (part of speech: adjective)
- He ain't got it in him to be comin' down hard and sharp on folks, and so he won't be a good wan. - "The Widow O'Callaghan's Boys", Gulielma Zollinger.
- " No." Then in a moment Fyles put a sharp question. - "The Law-Breakers", Ridgwell Cullum.
- Holliwell looked up in sharp surprise. - "The Branding Iron", Katharine Newlin Burt.