crust

US /krʌst/
UK /krʌst/
"crust" picture
1.

the hard outer part of bread

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He cut the crust off his sandwich.
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Some people prefer bread without the crust.
:
rindskinpeel
2.

a hard outer layer or covering of something

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The earth's crust is made up of several layers.
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A thin crust of ice formed on the pond.
:
layercoatingshell
1.

to form a hard outer layer or covering on something

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The mud had begun to crust over.
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The wound will crust over as it heals.
:
hardensolidifyscab
:
the upper crust