MITHRAISM Meaning of MITHRAISM in English n. the cult of the ancient Persian god Mithras associated with the sun. Mithraic adj. Mithraist n.[ L Mithras f. Gk Mithras f. OPers. Mithra f. Skr. Mitra ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012