1530s, "the mind in its primary state," from Latin tabula rasa, literally "scraped tablet," from which writing has been erased, thus ready to be written on again, from tabula (see table) + rasa, fem. past participle of radere "to scrape away, erase" (see raze). A loan-translation of Aristotle's pinakis agraphos, literally "unwritten tablet" ("De anima," 7.22).