Autonomy

Webster's Dictionary

(1): (n.) The power or right of self-government; self-government, or political independence, of a city or a state.

(2): (n.) The sovereignty of reason in the sphere of morals; or man's power, as possessed of reason, to give law to himself. In this, according to Kant, consist the true nature and only possible proof of liberty.

The Nuttall Encyclopedia

E . Self-law), in the Kantian metaphysics denotes the sovereign right of the pure reason to be a law to itself.