From The Collaborative International Dictionary of English v.0.48:
Crust \Crust\ (kr?st), n. [L. crusta: cf. OF. crouste, F.
cro[^u]te; prob. akin to Gr. ????? ice, E. crystal, from the
same root as E. crude, raw. See Raw, and cf. Custard.]
1. The hard external coat or covering of anything; the hard
exterior surface or outer shell; an incrustation; as, a
crust of snow.
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I have known the statute of an emperor quite hid
under a crust of dross. --Addison.
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Below this icy crust of conformity, the waters of
infidelity lay dark and deep as ever. --Prescott.
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2. (Cookery)
(a) The hard exterior or surface of bread, in distinction
from the soft part or crumb; or a piece of bread grown
dry or hard.
(b) The cover or case of a pie, in distinction from the
soft contents.
(c) The dough, or mass of doughy paste, cooked with a
potpie; -- also called dumpling.
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Th' impenetrable crust thy teeth defies.
--Dryden.
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He that keeps nor crust nor crumb. --Shak.
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They . . . made the crust for the venison pasty.
--Macaulay.
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3. (Geol.) The exterior portion of the earth, formerly
universally supposed to inclose a molten interior.
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4. (Zool.) The shell of crabs, lobsters, etc.
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5. (Med.) A hard mass, made up of dried secretions blood, or
pus, occurring upon the surface of the body.
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6. An incrustation on the interior of wine bottles, the
result of the ripening of the wine; a deposit of tartar,
etc. See Beeswing.
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From The Collaborative International Dictionary of English v.0.48:
Crust \Crust\, v. t. [imp. & p. p. Crusted; p. pr. & vb. n.
Crusting.] [Cf. OF. crouster, L. crustare. See Crust, n.
]
To cover with a crust; to cover or line with an incrustation;
to incrust.
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The whole body is crusted over with ice. --Boyle.
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And now their legs, and breast, and bodies stood
Crusted with bark. --Addison.
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Very foul and crusted bottles. --Swift.
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Their minds are crusted over, like diamonds in the
rock. --Felton.
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From The Collaborative International Dictionary of English v.0.48:
Crust \Crust\, v. i.
To gather or contract into a hard crust; to become incrusted.
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The place that was burnt . . . crusted and healed.
--Temple.
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