theist theism • theistic · · · Info · Definitions · Synonyms · Characters · · theist · · Text Latin · · Script 6 · · Length 2 · · Syllables Definitions · · · (noun) one who believes in the existence of a god or gods. · · Noun Definition 1 (adj) of or relating to theism. Synonyms: theistical, theistic. · · Adjective Definition 1 Synonyms · · · theistical · · Synonym 1 theistic · · Synonym 2 Characters · · e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 s latin small letter s U+0073 t latin small letter t U+0074