• (n.) The tenets of the Averroists.
A·ver'ro·ism noun The tenets of the Averroists. 
the philosophical system of Averroes, an important medieval philosopher and contemporary of Thomas Aquinas (see Thomism). Averroes denied the immortality of the soul but thought reason to be eternal and transcultural.
the philosophy of Averroës, largely based on Aristotelianism and asserting the unity of an active intellect common to all human beings while denying personal immortality.