"Priori " It is a Latinism which functions as an adverbial expression and means " before ". Its antonym is " subsequently " that means " after ". These expressions were " 34 fashion; in the intellectual world of the 18th century by Enmanuel Kant's philosophy, who for " priori " I meant what is the reason in the world of knowledge, which is innate, and " subsequently " What is the experience, is acquired.