1. house of parliament (congress, diet, etc.)
2. graduate school; postgraduate school
大学を卒業したら院に進むつもりだ。After I graduate from university, I plan to go on to grad school.
3. institution (often medical); institutional building; government office
やがて母親に連れられて娘は治療院を後にした。Eventually, the daughter left the clinic, accompanied by her mother.
4. sub-temple; minor temple building; temple; cloister
5. imperial palace
6. title bestowed on empresses, princesses, etc.
7. former (esp. of emperors, daimyos, etc.); late