n A building designed to diagnose and treat the sick, injured or dying. Usually has a staff of doctors and nurses to aid in the treatment of patients.
n A building founded for the long term care of its residents, such as an almshouse. The residents may have no physical ailments, but simply need financial support.
n (UK|chiefly|in prepositional phrases|without determiner|_|or article) The place and state of being hospitalized.