cavity
(noun)
noun
1. a sizeable hole (usually in the ground)
Similar word(s): pit
Definition categories: object, hole, hollow
2. space that is surrounded by something
Definition categories: shape, space
3. soft decayed area in a tooth; progressive decay can lead to the death of a tooth
Similar word(s): caries
Definition categories: process, decay
4. (anatomy) a natural hollow or sinus within the body
Similar word(s): cavum