1. holes or hollow spaces within something solid
2. areas of tooth decay where bacteria have created holes in teeth
Usage: dental/medical
3. hollow spaces within the body
Usage: medical/anatomical

Examples

• The old tree trunk had several cavities where animals could nest.
• The dentist found two cavities during my checkup.
• Regular brushing helps prevent cavities from forming.
• The cave explorer discovered large cavities deep underground.
• The chest X-ray showed abnormal cavities in the lungs.
• Birds often build nests in natural cavities in cliff faces.