Meaning ofsinusin English

Noun

1. a pouch or cavity in an organ
2. an abnormal cavity from tissue destruction
3. a cavity in a bone or skull
   The doctor examined the sinus in the patient's skull.
4. a passage for discharging infection
   The sinus infection caused severe headaches and congestion.
5. a curved notch in a leaf's margin; between lobes
   The leaf had a distinct sinus between its lobes.
6. a bay or recess in a shoreline; coastal indentation
   The coastline featured a large sinus that formed a natural harbor.