Meaning of “crust” in the English Dictionary

"crust" in English

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uk /krʌst/ us /krʌst/

[ C or U ] a hard outer covering of something:

pie crust (= the cooked pastry on top)
the earth's crust

[ C ] the outside layer of a loaf of bread:

Could you cut the crusts off the sandwiches, please?
adjective uk /ˈkrʌs.tɪd/ us /ˈkrʌs.tɪd/

crusted with mud

(Definition of “crust” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"crust" in American English

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us /krʌst/

crust noun (BREAD)

[ C/U ] a hard outer covering, esp. on a loaf of bread or a pastry

crust noun (EARTH)

earth science [ C ] the outer layer of the earth

adjective [ not gradable ] us /ˈkrʌs·təl/

earth science

crustal displacement

(Definition of “crust” from the Cambridge Academic Content Dictionary © Cambridge University Press)