Longman Dictionary of Contemporary English homepage

Topic: GEOLOGY

Date: 1300-1400
Language: Latin
Origin: crusta 'crust, shell'

crust

 noun
     
crust [uncountable and countable]
1 the hard brown outer surface of bread:
sandwiches with the crusts cut off
2DF the baked outer part of foods such as pies or pizzas:
a thin crust pizza
3 a thin hard dry layer on the surface of something:
A hard gray crust had formed on the bottom of the tea kettle.
4 the hard outer layer of the Earth:
deep within the Earth's crust

➔ earn a crust

at earn (1), upper crust
Definition of crust from the Longman Dictionary of Contemporary English within
the topic GEOLOGY
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