theism

[thee-iz-uh m] /ˈθi ɪz əm/
noun
1.
the belief in one God as the creator and ruler of the universe, without rejection of revelation (distinguished from deism).
2.
belief in the existence of a god or gods (opposed to atheism).
Origin
1670-80; the- + -ism
Related forms
theist
[thee-ist] /ˈθi ɪst/ (Show IPA), noun, adjective
theistic, theistical, adjective
theistically, adverb
nontheistic, adjective
nontheistical, adjective
nontheistically, adverb
untheistic, adjective
untheistical, adjective
untheistically, adverb
Can be confused
atheist, deist, theist.
British Dictionary definitions for theism

theism

/ˈθiːɪzəm/
noun
1.
the form of the belief in one God as the transcendent creator and ruler of the universe that does not necessarily entail further belief in divine revelation Compare deism
2.
the belief in the existence of a God or gods Compare atheism
Word Origin
C17: from Greek theos god + -ism
Word Origin and History for theism
n.

"belief in a deity," 1670s; see theist. Meaning "belief in one god" (as opposed to polytheism) is recorded from 1711.