Origin: Greek suffix -ism
Monotheism has 2 different meanings across 1 category:
belief in a single God
The belief in a single deity (one god or goddess); especially within an organized religion.
The word monotheism was coined around 1660 by combining the Greek words for "one" and "god." Henry More created this term to describe the belief in a single deity, distinguishing it from polytheism and atheism.