1. Become fractured; break or crack on the surface only
   "The glass cracked when it was heated";
   - check, break
    
2. Break suddenly and abruptly, as under tension
   "The pipe cracked";
   - snap
    
3. Break partially but keep its integrity
   "The glass cracked"
    
4. Cause to become cracked
   "heat and light cracked the back of the leather chair"
    
5. Make a very sharp explosive sound
   "His gun cracked"
    
6. Make a sharp sound
   "his fingers cracked";
   - snap
    
7. Hit forcefully; deal a hard blow, making a cracking noise
   "The teacher cracked him across the face with a ruler"
    
8. Pass through (a barrier)
   "Registrations cracked through the 30,000 mark in the county";
   - break through
    
9. Gain unauthorized access to computers with malicious intentions
   "she cracked my password"; "crack a safe"
    
10. Suffer a nervous breakdown
    "The pressure of the job caused him to crack up";
    - crack up [informal], break up, collapse
     
11. Tell spontaneously
    "crack a joke"
     
12. (chemistry) reduce (petroleum) to a simpler compound by cracking
    "The refinery cracks crude oil to produce petrol"
     
13. (chemistry) break into simpler molecules by means of heat
    "The petroleum cracked"
     
14. (of a voice) change in pitch, esp. as a result of emotional strain
    "His voice cracked as he delivered the emotional news"
     
15. Yield information under interrogation or torture
    "They managed to crack him on the third day";
    - break
     
16. Successfully decipher a code
    "The team worked tirelessly to crack the encrypted message";
    - break

1. A narrow planar hole in a rock or material, usually with flattish sides
   "Water seeped through the crack in the rock face";
   - cleft, crevice, fissure, scissure
    
2. A narrow space between things; a narrow opening
   "he opened the window a crack";
   - gap
    
3. A long narrow depression in a surface
   "There was a crack in the pavement";
   - crevice, cranny, fissure, chap
    
4. A sudden sharp noise
   "the crack of a whip";
   - cracking, snap
    
5. A blemish resulting from a break without complete separation of the parts
   "there was a crack in the mirror"
    
6. The act of cracking something
   "The crack in the windscreen started small but quickly spread";
   - fracture, cracking
    
7. A purified and potent form of cocaine that is smoked rather than snorted; highly addictive
   "The documentary explored the devastating effects of crack cocaine on urban communities";
   - crack cocaine
    
8. A chance to do something
   "he wanted a crack at the champion";
   - shot
    
9. A usually brief attempt
   "he took a crack at it";
   - fling, go, pass, whirl [informal], bash [Brit, informal]
    
10. [Ireland] A highly pleasurable or exciting experience
    "we had a crack at the party";
    - good time, blast [informal], ball [informal], craic [Ireland]
     
11. Witty remark
    "His crack about the boss's tie lightened the mood in the meeting";
    - wisecrack, sally, quip
     
12. (computing) a program, fake licence or procedure to circumvent software usage restrictions
    "He downloaded a crack for the software but it came with a virus"

1. Of the highest quality, skill, etc.; very good or impressive
   "a crack shot";
   - ace [informal], A-one [informal], first-rate, super, tiptop, topnotch [informal], top-notch [informal], tops [informal], A1 [informal], top-class, gnarly [N. Amer, informal], excellent, first-class, fantabulous [informal], splendid, ripping [Brit, archaic, informal], mean [informal], outstanding, lush [Brit, informal], brilliant, beezer [UK, archaic], stellar [informal], awesome [informal], top-drawer, dope [N. Amer, informal], socko [N. Amer, informal], righteous [US, slang], fab [Brit, informal], crucial [slang], rad [N. Amer, slang], radical [N. Amer, slang], nang [Brit, slang], phat [slang], legit [US, slang], awesomesauce [informal], amazeballs [informal], beaut [Austral, NZ, informal], lit [US, slang], storming [Brit, informal], blinding [Brit, slang], stonking [Brit, informal], brill [Brit, informal], wicked [slang], cushty [Brit, informal], def [slang], magic [Brit, slang], smokin' [slang], smoking [slang], sick [N. Amer, slang]

Derived forms: cracking, cracks, cracked

See also: super-duper [informal], superior

Type of: alter, attempt, blemish, break, break down, break in, break up, breakage, breaking, chance, change, cocaine, come apart, comment, decompose, defect, depression, effort, endeavor [US], endeavour [Brit, Cdn], experience, fall apart, gap, get, go, have, hit, impression, imprint, input, mar, modify, narrate, noise, opening, opportunity, pass, recite, recount, remark, retail[2], separate, sound, split up, suffer, sustain, tell, try

Encyclopedia: Crack, Koks, Piece Unternehmen