Definition of 'crust'

Noun

1. the outer layer of the Earth
      Synonyms: Earth's crust
2. a hard outer layer that covers something
      Synonyms: incrustation encrustation
3. the trait of being rude and impertinent; inclined to take liberties
      Synonyms: gall impertinence impudence insolence cheekiness freshness

Verb

1. form a crust or form into a crust; "The bread crusted in the oven"

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