| 1. | to break without complete separation of parts; become fissured: The plate cracked when I dropped it, but it was still usable. |
| 2. | to break with a sudden, sharp sound: The branch cracked under the weight of the snow. |
| 3. | to make a sudden, sharp sound in or as if in breaking; snap: The whip cracked. |
| 4. | (of the voice) to break abruptly and discordantly, esp. into an upper register, as because of weariness or emotion. |
| 5. | to fail; give way: His confidence cracked under the strain. |
| 6. | to succumb or break down, esp. under severe psychological pressure, torture, or the like: They questioned him steadily for 24 hours before he finally cracked. |
| 7. | Chemistry. to decompose as a result of being subjected to heat. |
| 8. | Chiefly South Midland and Southern U.S. to brag; boast. |
| 9. | Chiefly Scot. to chat; gossip. |
| 10. | to cause to make a sudden sharp sound: The driver cracked the whip. |
| 11. | to break without complete separation of parts; break into fissures. |
| 12. | to break with a sudden, sharp sound: to crack walnuts. |
| 13. | to strike and thereby make a sharp noise: The boxer cracked his opponent on the jaw. |
| 14. | to induce or cause to be stricken with sorrow or emotion; affect deeply. |
| 15. | to utter or tell: to crack jokes. |
| 16. | to cause to make a cracking sound: to crack one's knuckles. |
| 17. | to damage, weaken, etc.: The new evidence against him cracked his composure. |
| 18. | to make mentally unsound. |
| 19. | to make (the voice) harsh or unmanageable. |
| 20. | to solve; decipher: to crack a murder case. |
| 21. | Informal. to break into (a safe, vault, etc.). |
| 22. | Chemistry. to subject to the process of cracking, as in the distillation of petroleum. |
| 23. | Informal. to open and drink (a bottle of wine, liquor, beer, etc.). |
| 24. | a break without complete separation of parts; fissure. |
| 25. | a slight opening, as between boards in a floor or wall, or between a door and its doorpost. |
| 26. | a sudden, sharp noise, as of something breaking. |
| 27. | the snap of or as of a whip. |
| 28. | a resounding blow: He received a terrific crack on the head when the branch fell. |
| 29. | Informal. a witty or cutting remark; wisecrack. |
| 30. | a break or change in the flow or tone of the voice. |
| 31. | Informal. opportunity; chance; try: Give him first crack at the new job. |
| 32. | a flaw or defect. |
| 33. | Also called rock. Slang. pellet-size pieces of highly purified cocaine, prepared with other ingredients for smoking, and known to be especially potent and addicting. |
| 34. | Masonry. check 1 (def. 41). |
| 35. | a mental defect or deficiency. |
| 36. | a shot, as with a rifle: At the first crack, the deer fell. |
| 37. | a moment; instant: He was on his feet again in a crack. |
| 38. | Slang. a burglary, esp. an instance of housebreaking. |
| 39. | Chiefly British. a person or thing that excels in some respect. |
| 40. | Slang: Vulgar. the vulva. |
| 41. | Chiefly Scot. conversation; chat. |
| 42. | British Dialect. boasting; braggadocio. |
| 43. | Archaic. a burglar. |
| 44. | first-rate; excellent: a crack shot. |
| 45. | with a cracking sound. |
| 46. | crack down, to take severe or stern measures, esp. in enforcing obedience to laws or regulations: The police are starting to crack down on local drug dealers. |
| 47. | crack off, to cause (a piece of hot glass) to fall from a blowpipe or punty. |
| 48. | crack on, Nautical.
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| 49. | crack up, Informal.
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| 50. | crack a book, Informal. to open a book in order to study or read: He hardly ever cracked a book. |
| 51. | crack a smile, Informal. to smile. |
| 52. | crack wise, Slang. to wisecrack: We tried to be serious, but he was always cracking wise. |
| 53. | fall through the cracks, to be overlooked, missed, or neglected: In any inspection process some defective materials will fall through the cracks. Also, slip between the cracks. |
| 54. | get cracking, Informal.
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