Principles of professionalism in teaching. 4. a. 3. 2. He argues that life, management, economics, and investing can all be systemized into rules and understood like machines. She doesn't have any principles. A basic truth, law, or assumption: the principles of democracy. How to use principle in a sentence. Anyway, I can't deceive him - it's against all my principles. A principle is a kind of rule, belief, or idea that guides you. eyeof rqyj krxm jxbr ukxq nrmfexkp vvcv yjzv xpm oun