pantheismPronunciation: /ˈpanθiːɪz(ə)m/Definition of pantheism noun [mass noun] 1a doctrine which identifies God with the universe, or regards the universe as a manifestation of God. 2the worship or tolerance of many gods. Derivatives pantheist noun pantheisticPronunciation: /-ˈɪstɪk/ adjective pantheisticalPronunciation: /-ˈɪstɪk(ə)l/ adjective pantheisticallyPronunciation: /-ˈɪstɪk(ə)li/ adverb Origin: mid 18th century: from pan- 'all' + Greek theos 'god' + -ismpantheism in other Oxford dictionaries Definition of pantheism in the US English dictionary