non-substantialism
/ˌnɒnsəbˈstanʃəlɪz(ə)m/ /ˌnɒnsəbˈstanʃ(ə)lɪz(ə)m/ /ˌnɒnsəbˈstɑːnʃəlɪz(ə)m/Philosophy rare
noun
The belief that the world is without substance.
Origin
Mid 19th century; earliest use found in David Masson (1822–1907), biographer, literary scholar, and editor. From non-substantial + -ism. Compare later substantialism.