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1. Become fractured; break or crack on the surface only
   "The glass cracked when it was heated";
   - check, break
    
2. Make a very sharp explosive sound
   "His gun cracked"
    
3. Make a sharp sound
   "his fingers cracked";
   - snap
    
4. Hit forcefully; deal a hard blow, making a cracking noise
   "The teacher cracked him across the face with a ruler"
    
5. Pass through (a barrier)
   "Registrations cracked through the 30,000 mark in the county";
   - break through
    
6. Break partially but keep its integrity
   "The glass cracked"
    
7. Break suddenly and abruptly, as under tension
   "The pipe cracked";
   - snap
    
8. Gain unauthorized access to computers with malicious intentions
   "she cracked my password"; "crack a safe"
    
9. Suffer a nervous breakdown
   - crack up, crock up, break up, collapse
    
10. Tell spontaneously
    "crack a joke"
     
11. Cause to become cracked
    "heat and light cracked the back of the leather chair"
     
12. (chemistry) reduce (petroleum) to a simpler compound by cracking
     
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
     
15. Yield information under interrogation or torture
    "They managed to crack him on the third day";
    - break
     
16. Successfully decipher a code
    - break

1. A narrow planar hole in a rock or material, usually with a flattish sides
   - 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
   - crevice, cranny, fissure, chap
    
4. A sudden sharp noise
   "the crack of a whip";
   - cracking, snap
    
5. A chance to do something
   "he wanted a crack at the champion";
   - shot
    
6. Witty remark
   - wisecrack, sally, quip
    
7. A blemish resulting from a break without complete separation of the parts
   "there was a crack in the mirror"
    
8. A purified and potent form of cocaine that is smoked rather than snorted; highly addictive
   - crack cocaine, tornado
    
9. A usually brief attempt
   "he took a crack at it";
   - fling, go, pass, whirl [informal], offer, bash [Brit, informal]
    
10. The act of cracking something
    - fracture, cracking
     
11. [Ireland] A highly pleasurable or exciting experience
    "we had a crack at the party";
    - good time, blast [informal], ball [informal], craic [Ireland]
     
12. (computing) a program, fake licence or procedure to circumvent software usage restrictions

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], excellent, first-class, fantabulous [informal], splendid, ripping [Brit, informal], mean [informal], beezer [UK, archaic], lush [Brit, informal], stellar [informal], awesome [informal], brilliant, outstanding, top-drawer

Derived forms: cracks, cracked, cracking

See also: ace [informal], amazeballs [informal], awesomesauce [informal], beaut [Austral, NZ, informal], blinding [Brit, slang], brill [Brit, informal], crucial [slang], cushty [Brit, informal], def [slang], fab [Brit, informal], legit [US, slang], lit [US, slang], magic [Brit, slang], nang [Brit, slang], phat [slang], rad [N. Amer, slang], radical [N. Amer, slang], righteous [US, slang], sick [N. Amer, slang], smokin' [slang], smoking [slang], socko [N. Amer, informal], stonking [Brit, informal], storming [Brit, informal], super [informal], super-duper [informal], superior, wicked [slang]

Type of: alter, attempt, blemish, break, break down, break in, break up, breakage, breaking, chance, change, cocain, 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