theism /ˈθiː.ɪz.əm/noun 2/ˈtiː.ɪz.əm/ noun 1forms 1 noun2 •Belief in the existence of at least one deity. •Belief in the existence of a personal creator god, goddess, gods and/or goddesses present and active in the governance and organization of the world and the universe. The God may be known by or through revelation.The term stands in contradistinction to theism which, in its widest sense, means belief in a personal god, goddess, gods and/or goddesses. — 1999 theism /ˈtiː.ɪz.əm/ noun1 •A morbid condition resulting from excessive consumption of tea."Theism" belongs to that genus of disease in which morphinism, caffeinism, and vanillaism belong. — 1888 formstheisms