A hospital is a medical facility, usually planetside, where patients can be cured.
While in search for the Lyran survivors of a frigate crash, Vaebn Mairex had to remain at a hospital to wait until they cure. At the same time, Rihanna wished that she could be a hit in Lyran hospitals. (RIS Bouteina: "Kingdom Hospital")
Tal Shiar presence in Romulan hospitals is often assured by LMHs, although EMHs could also serve that purpose. They were also adept at using field hospitals to cure the Romulans away from home. (RIS Bouteina: "Hospital Blues")