'Hospital ship' definitions:

Definition of 'hospital ship'

noun

A ship built to serve as a hospital; used for wounded in wartime

From: GCIDE

Hospital \Hos"pi*tal\, n. [OF. hospital, ospital, F. h[^o]pital, LL. hospitale (or perh. E. hospital is directly from the Late Latin), from L. hospitalis relating to a guest, hospitalia apartments for guests, fr. hospes guest. See Host a landlord, and cf. Hostel, Hotel, Spital.]
1. A place for shelter or entertainment; an inn. [Obs.] --Spenser. [1913 Webster]
2. A building in which the sick, injured, or infirm are received and treated; a public or private institution founded for reception and cure, or for the refuge, of persons diseased in body or mind, or disabled, infirm, or dependent, and in which they are treated either at their own expense, or more often by charity in whole or in part; a tent, building, or other place where the sick or wounded of an army cared for. [1913 Webster]
Hospital ship, a vessel fitted up for a floating hospital.
Hospital Sunday, a Sunday set apart for simultaneous contribution in churches to hospitals; as, the London Hospital Sunday. [1913 Webster]