An example of monotheism is the religion of Christianity.
Origin of monotheismmono- + theism
A learned 17th-century coinage, mono- +"Ž theism, from (Î¼Î¿Î½ÏŒÏ‚ (monÃ³s, “one")) and (Î¸ÎµÏŒÏ‚ (theÃ³s, “god, deity") + -Î¹ÏƒÎ¼ÏŒÏ‚ (-ismos)) 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.