1. [ noun ] (geology) the outer layer of the Earth
Synonyms: Earth's_crust
Related terms: layer horst plate lithosphere asthenosphere sima sial
2. [ noun ] a hard outer layer that covers something
Synonyms: encrustation incrustation
Related terms: covering tartar encrust encrust
3. [ verb ] form a crust or form into a crust

"The bread crusted in the oven"

Related terms: change_surface dry
4. [ noun ] the trait of being rude and impertinent; inclined to take liberties
Synonyms: insolence impertinence impudence cheekiness freshness gall
Related terms: discourtesy chutzpa
Similar spelling:   crusty