monotheism

• mono-theism

A learned 17th-century coinage, mono- +‎ theism, from (μονός (monós, “one”)) and (θεός (theós, “god, deity”) + -ισμός (-ismós)) The term parallels the earlier polytheism, atheism (the simplex theism being slightly later). The earliest known use is by Henry More, ca. 1660, in explicit juxtaposition with both atheism and polytheism. It was redefined through etymological fallacy by Daniel Webster ca. 1828.

• IPA^(key): /ˌmɑnoʊ̯ˈθiɪzm̩/

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monotheism (countable and uncountable, plural monotheisms)

1. (obsolete) Belief in the One True God, defined by Moore as personal, immaterial and trinitarian.
2. The belief in a single deity (one god or goddess); especially within an organized religion.
3. The belief that God is one person (Judaism, Unitarian Christianity, Islam), not three persons (Trinitarian Christianity, Hinduism)

• neo-Thomism, nomotheism, theomonism