Meaning of RED in English

RED

Red BrE AmE adjective

1 . derogatory (especially in newspapers) supporting ↑ left-wing political ideas; Socialist or Communist:

‘Red Ken wins seat in Parliament.’ (=newspaper report)

2 . of Communist countries; especially formerly the communist countries of Eastern Europe

3 . better Red than dead a phrase used during the Cold War by some people opposed to ↑ nuclear weapons, meaning that it would be better to be controlled by a Communist government than to be killed in a nuclear war

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.