In Christianity, "saint" has a wide variety of meanings, depending on the context and denomination. The original Christian denotation was any believer who is "in Christ" and in whom Christ dwells, whether in Heaven or on earth. In Orthodox and Roman Catholic doctrine, all of their faithful deceased in Heaven are considered to be saints, but some are considered worthy of greater honor, emulation, or veneration, with official ecclesiastical recognition given to some saints by canonization or glorification.
Definition of Saint