What is the definition of critical thinking?

Higher thinking to solve a problem

Disciplined thinking and judgement
A, B and C are all part of critical thinking. Critical thinking does involve higher level thinking skills, but thats not what defines critical thinking. Finding faults and weaknesses might be done by someone thinking critically. Logically analyzing arguments in a critical way is begging the question of what exactly is critical thinking. The best answer is that critical thinking is first and foremost disciplined thinking.