The crossword solution for the term 'Tabula Rasa' (Blank Slate) is RASA, a four-letter word. Tabula Rasa is a Latin phrase meaning 'blank slate' and is used to describe the idea that individuals are born without any preconceived notions or ideas. This concept has been used in philosophy, psychology, and other fields of study. It suggests that people are born with a clean slate and that their experiences and environment shape their beliefs and values.