1. person who betrays his or her country, a friend, duty, etc. شخصی که به کشور ، دوست و یا وظیفه اش خیانت می کند a. The patriot sneered when asked to stand on the same platform with the man who was accused of being a traitor. b. No villain is worse than a traitor who betrays his country. c. Do not call him a traitor unless you can verify the charge.