Critical thinking is a technique for evaluating information and ideas, for deciding what to accept and believe.
Critical reading refers to a careful, active, reflective, analytic reading.
Critical thinking involves reflecting on the validity of what you have read in light of our prior knowledge and understanding of the world. Critical thinking would come into play when deciding whether the chosen meaning was indeed true, and whether or not you, as the reader, should support that practice. In actual practice, critical reading and critical thinking work together. Critical thinking allows us to monitor our understanding as we read. Conversely, critical thinking depends on critical reading.