Noun

1. A long narrow opening
2. A narrow opening
3. A long narrow depression in a surface
4. A sudden sharp noise
5. A chance to do something
6. Witty remark
7. A blemish resulting from a break without complete separation of the parts
8. A purified and potent form of cocaine that is smoked rather than snorted; highly addictive
9. A usually brief attempt
10. The act of cracking something

Verb

1. Become fractured; break or crack on the surface only
2. Make a very sharp explosive sound
3. Make a sharp sound
4. Hit forcefully; deal a hard blow, making a cracking noise
5. Pass through (a barrier)
6. Break partially but keep its integrity
7. Break suddenly and abruptly, as under tension
8. Gain unauthorized access computers with malicious intentions
9. Suffer a nervous breakdown
10. Tell spontaneously
11. Cause to become cracked
12. Reduce (petroleum) to a simpler compound by cracking
13. Break into simpler molecules by means of heat