Different philosophers, theorists and scientists have proposed different definitions for Critical Thinking. Given the complex nature of thinking and its complex interdependence with others and the environment, it is indeed difficult to narrow down the definition of Critical Thinking to a single statement. However, to begin with, the following, as defined by the Foundation of Critical Thinking is one of the most comprehensive,

1) Critical thinking is that mode of thinking – about any subject, content, or problem – in which the thinker improves the quality of his or her thinking by skillfully analyzing, assessing, and reconstructing it. Critical thinking is self-directed, self-disciplined, self-monitored, and self-corrective thinking. It presupposes assent to rigorous standards of excellence and mindful command of their use. It entails effective communication and problem-solving abilities, as well as a commitment to overcome our native egocentrism and sociocentrism.

2) Simply put, Critical Thinking is a way of thinking that facilitates understanding ourselves and our environment by recognizing patterns, making connections across domains, questioning, making sense that paves the path for growth and development.