Definitions

1. noun

The outer layer of the earth’s surface, especially the rocky outer layer.

“The crust of the earth is composed of several tectonic plates.”

2. noun

The top layer of a baked food, especially bread, pastry, or cake.

“The crust on the pizza was golden brown and crispy.”

3. noun

A hard outer layer on the skin of fruit, especially apples.

“The crust on the apple made it difficult to bite into.”

4. noun

A hard outer layer on the surface of a wound.

“The crust on the wound made it difficult to clean.”

5. verb

To form a hard outer layer on the surface of something.

“The metal will crust over if it is exposed to air.”

6. verb

To become covered in a hard outer layer.

“The wound will crust over in a few days.”

7. adjective

Having a hard outer layer.

“The crusty bread was perfect for dipping in soup.”

8. adjective

Having a rough or hardened surface.

“The crusty soil made it difficult to plant a garden.”