Occamism (or Ockhamism) is the philosophical and theological teaching developed by William of Ockham (1285–1347) and his disciples, which had widespread currency in the fourteenth century.

William of Ockham the eponym of Occamism.

Occamism differed from the other Scholastic schools on two major points: first, Occamism strongly argued position that only individuals exist, rather than supra-individual metaphysical universals, essences, or forms, and that universals are the products of abstraction from individuals by the human mind and have no extra-mental existence.[1] Second, Occamism denied the real existence of metaphysical universals and advocated the reduction of ontology.