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crust - definition and synonyms


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noun [countable/uncountable] crust pronunciation in British English /krʌst/
Word Forms
  1. 1
    the hard brown outer part of a loaf of bread
    a crust of bread:

    Sparrows pecked at a crust of bread.

  2. 2
    a layer of cooked pastry that forms the outer part of a pie. The inner part is called the filling.
  3. 3
    the thick outer surface of the Earth or another planet
    the Earth’s crust:

    Molten lava rose up from beneath the Earth’s crust.

  4. 4
    a hard layer of a substance covering a softer substance or a liquid

    I washed the crust of make-up from my face.



to fall over forwards so that your face hits the ground or another surface

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the activity of exploring abandoned buildings and other manmade structures

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