sharp in WordNet English dictionary

1. extremely steep
   "an abrupt canyon"; "the precipitous rapids of the upper river"; "the precipitous hills of Chinese paintings"; "a sharp drop"
   abrupt  precipitous  sharp 
   
2. ending in a sharp point
   acuate  acute  sharp  needlelike 
   
3. having or demonstrating ability to recognize or draw fine distinctions
   "an acute observer of politics and politicians"; "incisive comments"; "icy knifelike reasoning"; "as sharp and incisive as the stroke of a fang"; "penetrating insight"; "frequent penetrative observations"
   acute  discriminating  incisive  keen  knifelike  penetrating  penetrative  piercing  sharp 
   
4. marked by practical hardheaded intelligence
   "a smart businessman"; "an astute tenant always reads the small print in a lease"; "he was too shrewd to go along with them on a road that could lead only to their overthrow"
   astute  sharp  shrewd 
   
5. (of something seen or heard) clearly defined
   "a sharp photographic image"; "the sharp crack of a twig"; "the crisp snap of dry leaves underfoot"
   crisp  sharp 
   
6. having or made by a thin edge or sharp point; suitable for cutting or piercing
   "a sharp knife"; "a pencil with a sharp point"
   sharp 
   
7. (of a musical note) raised in pitch by one chromatic semitone
   "C sharp"
   sharp 
   
8. keenly and painfully felt; as if caused by a sharp edge or point
   "a sharp pain"; "sharp winds"
   sharp 
   
9. quick and forceful
   "a sharp blow"
   sharp 
   
10. having or emitting a high-pitched and sharp tone or tones
    "a shrill whistle"; "a shrill gaiety"
    shrill  sharp 
    
11. very sudden and in great amount or degree
    "a sharp drop in the stock market"
    sharp 
    
12. harsh
    "sharp criticism"; "a sharp-worded exchange"; "a tart remark"
    sharp  sharp-worded  tart 
    

1. changing suddenly in direction and degree
   "the road twists sharply after the light"; "turn sharp left here"; "the visor was acutely peaked"; "her shoes had acutely pointed toes"
   sharply  sharp  acutely  sharply  sharp  acutely 
   

1. a long thin sewing needle with a sharp point
   sharp 
   
2. a musical notation indicating one half step higher than the note named
   sharp