cognition UK /kɒɡˈnɪʃ.ən/US /kɑɡˈnɪʃ.ən/ noun3 •The process of knowing, of acquiring knowledge and understanding through thought and through the senses.Children develop cognition rapidly in their early years.The study focused on animal cognition. •A result of a cognitive process. •(no longer used) Knowledge; awareness. formscognitions