Dis-loy'al, a.

a. [Prefix dis and loyal, q. v.; O. Fr. desloial, desleal, now déloyal, Pr. desleial, desial, Sp. & Pg. desleal, It. disleale.] Not loyal; not true in fact or feeling to a sovereign or lawful superior; false to allegiance; faithless; treacherous; as, a subject disloyal to the king; a husband disloyal to his wife. “Disloyal love.” Spencer.

Synonyms—Disobedient; faithless; treacherous; perfidious; dishonest; inconstant.