noun the shell of crabs, lobsters, ·etc.
2. crust ·vi to gather or contract into a hard crust; to become incrusted.
3. crust ·noun the cover or case of a pie, in distinction from the soft contents.
4. crust ·noun the dough, or mass of doughy paste, cooked with a potpie;
also called dumpling.
5. crust ·noun the exterior portion of the earth, formerly universally supposed to inclose a molten interior.
6. crust ·noun to cover with a crust; to cover or line with an incrustation; to incrust.
7. crust ·noun a hard mass, made up of dried secretions blood, or pus, occurring upon the surface of the body.
8. crust ·noun the hard exterior or surface of bread, in distinction from the soft part or crumb; or a piece of bread grown dry or hard.
9. crust ·noun the hard external coat or covering of anything; the hard exterior surface or outer shell; an incrustation; as, a crust of snow.
10. crust ·noun an incrustation on the interior of wine bottles, the result of the ripening of the wine; a deposit of tartar, ·etc. ·see beeswing.