What does CRACK mean?

verb

1. become fractured; break or crack on the surface only“The glass cracked when it was heated”
2. make a very sharp explosive sound“His gun cracked”
3. make a sharp sound“his fingers snapped”
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”
6. break partially but keep its integrity“The glass cracked”
7. break suddenly and abruptly, as under tension“The pipe snapped”
8. gain unauthorized access computers with malicious intentions“she cracked my password”