Possible Definitions:
1. Crunch (v. i.) To chew with force and noise; to craunch.
2. Crunch (v. i.) To grind or press with violence and noise.
3. Crunch (v. i.) To emit a grinding or craunching noise.
4. Crunch (v. t.) To crush with the teeth; to chew with a grinding noise; to craunch; as, to crunch a biscuit.