Pronunciation: (hos'pi-tl-ur),[key] —n. 1. a member of the religious and military order (Knights Hospitalers or Knights of St. John of Jerusalem) originating about the time of the first Crusade (1096–99) and taking its name from a hospital at Jerusalem.
2. (l.c.) a person, esp. a member of a religious order, devoted to the care of the sick or needy in hospitals. Also,Hos'pi•tal•ler.