Abstract

Kant insists that definitions cannot be set in stone at the outset of a metaphysical investigation, but instead must be developed successively over the course of it, and should ideally be finalized only at the end. He even suggests that the task of a critical treatment of metaphysical concepts lies in an infinite approximation towards the essence of what they purport to designate. My focus is on this Kantian idea of approximating essence in definition. I begin with a reading of Kant’s remarks on the methodology of definition in the Doctrines of Method of the Critique of Pure Reason and of the Jäsche Logic. On that basis I develop an account of what I take to be the most crucial application of that methodology, which nonetheless presents a lacuna in recent scholarship: Kant’s successive definition of the concept of the understanding in general, or the overall capacity for thought and cognition. I close by suggesting how this application might matter for Kant’s project of enlightenment.