1. Of skin, roughened as a result of cold or exposure
   "cracked lips";
   - chapped
    
2. Of paint or varnish; having the appearance of alligator hide
   "The old boat's cracked paint needed to be stripped and redone";
   - alligatored
    
3. [slang] Insane, strange, eccentric or stupid
   "The old man's cracked theories about aliens made everyone laugh";
   - balmy [archaic, slang], barmy [slang], bats [slang], batty [slang], bonkers [slang], buggy [N. Amer, slang], crackers [slang], daft [Brit, slang], dotty [Brit, slang], fruity [slang], haywire [slang], kooky [slang], kookie [slang], loco [slang], loony [slang], loopy [slang], nuts [slang], nutty [slang], round the bend [slang], around the bend [slang], wacky [slang], whacky [slang], daffy [slang], dippy [slang], doolally [Brit, slang], wacko [slang], daft as a brush [Brit, slang], potty [Brit, slang], round the twist [Brit, slang], dumbass [N. Amer, slang], nutsy [N. Amer, slang], barking mad [Brit, slang], mental [slang], barking [Brit, slang], bughouse [N. Amer, slang], cuckoo [slang]
    
4. (of a voice) harsh or dissonant
   "His cracked voice betrayed his nervousness during the speech"

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

See also: insane, rough, unsmooth

Type of: alter, break, break down, break in, break up, change, come apart, decompose, fall apart, get, go, have, hit, modify, narrate, pass, recite, recount, retail[2], separate, sound, split up, suffer, sustain, tell

Encyclopedia: Cracked