noun
- air-filled spaces in the bones of the skull that connect to the nasal cavity
Usage: anatomy; plural of sinus
Examples
- My sinuses are blocked due to allergies.
- The cold weather made her sinuses ache.
- He used a nasal spray to clear his sinuses.
- Sinus infections can cause pressure in the sinuses.
- The doctor examined his sinuses with a special light.
- Steam from hot tea can help open congested sinuses.