noun
crust
kruhst
noun
1
The hard outer layer of something, especially bread or the Earth.
"The bread had a crisp, golden crust."
"The Earth's crust is thinnest beneath the oceans."
verb
1
To form or become covered with a hard outer layer.
"Snow had crusted over on the windowsill overnight."
How to Use Crust
Learner’s notesIn plain EnglishThe tough outer layer on things like bread, pastry, snow, or the Earth itself.
Common pairings
crust of bread
pie crust
Earth's crust
Word Forms
crusted past tense, crusts singular
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The bread had a crisp, golden _____.
Etymology
From Latin crusta ("hard outer covering"), the same root that gives us "crustacean" and "custard".