天主 Traditional form: 天主 Pinyin (reading): Tiānzhǔ Definitions: God (in Catholicism) abbr. for 天主教 ( Tiānzhǔjiào), Catholicism Characters: 天 - sky, heaven; god, celestial 主 - to own; to host; master; host; lord Traditional characters: 天 - sky, heaven; god, celestial 主 - to own; to host; master; host; lord