[noun] [C] [disapproving] - a person who is not or stops being loyal to their own country, social class, beliefs etc.The leaders of the rebellion were hanged as traitors.The Chinese Communist Party branded (= called) Mr Gorbachev 'a traitor to socialism'.You've betrayed us, you traitor! [as form of address]
TRAITOR
Meaning of TRAITOR in English
Cambridge English vocab. Кембриджский английский словарь. 2012