the philosophical system of George Berkeley, holding that objects exist only when perceived, that God's perception sustains the universe, and that there is no independent substratum or substance in which these perceptions inhere
Berkeleianism in American English
(ˈbɑrkliˌɪzəm; ˈbɜrkliˌɪzəm)
noun
the philosophy of George Berkeley, which holds that what are called physical objects exist only as ideas in God's mind and, in other minds, as perceptions of those ideas