Definitions
1.nounA more solid, dense or hard layer on a surface or boundary.
2.nounThe external, hardened layer of certain foodstuffs, including most types of bread, fried meat, etc.
3.nounAn outer layer composed of pastry
4.nounThe bread-like base of a pizza.
5.nounThe outermost layer of the lithosphere of the Earth.
6.nounThe shell of crabs, lobsters, etc.
7.nounNerve, gall."You've got a lot of crust standing there saying that."
8.nounA living."to earn one's crust"
9.verbTo cover with a crust.
10.verbTo form a crust.
11.nounA subgenre of punk rock, derived from hardcore punk with extreme metal elements, often with pessimistic lyrics about political and social ills.