1. a hollow space or hole inside something
2. a decayed area in a tooth
Usage: dental
3. a hollow space within the body
Usage: anatomy

Examples

• The dentist found a small cavity in my molar.
• Birds often nest in tree cavities.
• The chest cavity contains the heart and lungs.
• Water collected in the cavity of the rock.
• The wall had a hidden cavity behind the bookshelf.
• She needed a filling for the cavity in her back tooth.
• The abdominal cavity houses many vital organs.