disapproval If you describe ways of doing things as unorthodox, you are criticizing them because they are unusual or illegal. The charity says the journalists appear to have obtained confidential documents in an unorthodox manner. orthodox. unorthodox opinions or methods are different from what is usual or accepted by most people unorthodox view/approach/theory etc
If you describe someone's behaviour, beliefs, or customs as unorthodox, you mean that they are different from what is generally accepted. She spent an unorthodox girlhood travelling with her father throughout Europe His methods were unorthodox, and his lifestyle eccentric. = unconventional orthodox