1. (

• pit ,
• cavity

) a sizeable hole (usually in the ground); "they dug a pit to bury the body" ;

2. (

• cavity ,
• enclosed_space

) space that is surrounded by something ;

3. (

• cavity ,
• caries ,
• dental_caries ,
• tooth_decay

) soft decayed area in a tooth; progressive decay can lead to the death of a tooth ;

4. (

• cavity ,
• bodily_cavity ,
• cavum

) (anatomy) a natural hollow or sinus within the body ;