"a guardian; one who has care or superintendence of something," late 14c., curatour "a parish priest," from Latin curator "overseer, manager, guardian," agent noun from curatus, past participle of curare (see cure (v.)). From early 15c. in reference to those put in charge of minors, lunatics, etc.; meaning "officer in charge of a museum, library, etc." is from 1660s. Related: Curatorship.