ˈtrād.ə(r), -ātə- noun
( -s )
Etymology: Middle English traitre, traitour, from Old French traitre, traitur, from Latin traditor, from traditus (past participle of tradere to hand over, deliver, betray, from trans-, tra- trans- + -dere (from dare to give) + -or — more at date
1. : one that betrays another's trust or is false to an obligation or duty
she sought to make me traitor to myself — John Milton
valley boys who play golf are traitors to their class — M.S.Mayer
2. : one that commits treason against his country (as by surrendering a fort or army unvanquished to an enemy) : one that violates his allegiance to his nation by levying war against it or by aiding its enemies