crack in WordNet English dictionary

1. of the highest quality
   "an ace reporter"; "a crack shot"; "a first-rate golfer"; "a super party"; "played top-notch tennis"; "an athlete in tiptop condition"; "she is absolutely tops"
   ace  A-one  crack  first-rate  super  tiptop  topnotch  top-notch  tops 
   

1. become fractured; break or crack on the surface only
   "The glass cracked when it was heated"
   crack  check  break 
   
2. pass through (a barrier)
   "Registrations cracked through the 30,000 mark in the county"
   break through  crack 
   
3. suffer a nervous breakdown
   crack up  crack  crock up  break up  collapse 
   
4. break suddenly and abruptly, as under tension
   "The pipe snapped"
   snap  crack 
   
5. break partially but keep its integrity
   "The glass cracked"
   crack 
   
6. cause to become cracked
   "heat and light cracked the back of the leather chair"
   crack 
   
7. reduce (petroleum) to a simpler compound by cracking
   crack 
   
8. break into simpler molecules by means of heat
   "The petroleum cracked"
   crack 
   
9. tell spontaneously
   "crack a joke"
   crack 
   
10. hit forcefully; deal a hard blow, making a cracking noise
    "The teacher cracked him across the face with a ruler"
    crack 
    
11. make a sharp sound
    "his fingers snapped"
    snap  crack 
    
12. make a very sharp explosive sound
    "His gun cracked"
    crack 
    
13. gain unauthorized access computers with malicious intentions
    "she cracked my password"; "crack a safe"
    crack 
    

1. a long narrow depression in a surface
   crevice  cranny  crack  fissure  chap 
   
2. a long narrow opening
   crack  cleft  crevice  fissure  scissure 
   
3. the act of cracking something
   fracture  crack  cracking 
   
4. a usually brief attempt
   "he took a crack at it"; "I gave it a whirl"
   crack  fling  go  pass  whirl  offer 
   
5. a narrow opening
   "he opened the window a crack"
   gap  crack 
   
6. a purified and potent form of cocaine that is smoked rather than snorted; highly addictive
   crack  crack cocaine  tornado 
   
7. a blemish resulting from a break without complete separation of the parts
   "there was a crack in the mirror"
   crack 
   
8. witty remark
   wisecrack  crack  sally  quip 
   
9. a sudden sharp noise
   "the crack of a whip"; "he heard the cracking of the ice"; "he can hear the snap of a twig"
   crack  cracking  snap 
   
10. a chance to do something
    "he wanted a shot at the champion"
    shot  crack