Trai″tor‐ous (?), a. [Cf. F. traîtreux.] 1. Guilty of treason; treacherous; perfidious; faithless; as, a traitorous officer or subject. Shak.
2. Consisting in treason; partaking of treason; implying breach of allegiance; as, a traitorous scheme.
— Trai″tor‐ous‐ly, adv. — Trai″tor‐ous‐ness, n.