(n.) The hard external coat or covering of anything; the hard
exterior surface or outer shell; an incrustation; as, a crust of snow.
(n.) The hard exterior or surface of bread, in distinction from
the soft part or crumb; or a piece of bread grown dry or hard.
(n.) The cover or case of a pie, in distinction from the soft
contents.
(n.) The dough, or mass of doughy paste, cooked with a potpie; --
also called dumpling.
(n.) The exterior portion of the earth, formerly universally
supposed to inclose a molten interior.
(n.) The shell of crabs, lobsters, etc.
(n.) A hard mass, made up of dried secretions blood, or pus,
occurring upon the surface of the body.
(n.) An incrustation on the interior of wine bottles, the result
of the ripening of the wine; a deposit of tartar, etc. See Beeswing.
(n.) To cover with a crust; to cover or line with an
incrustation; to incrust.
(v. i.) To gather or contract into a hard crust; to become
incrusted.
