n.
Pronunciation: ' tr ā -t ə r
Function: noun
Etymology: Middle English traytour, from Anglo-French traitre, from Latin traditor, from tradere to hand over, deliver, betray, from trans-, tra- trans- + dare to give ― more at DATE
Date: 13th century
1 : one who betrays another's trust or is false to an obligation or duty
2 : one who commits treason