Monotheism (from Greek: μόνος, monos - one, and θεός, theos - gods) is the belief that there is only one god. or the belief that God is one (Undivided) Pure monotheism is found in Judaism and Islam. The soft type is found in most Christianity, Sabianism, Mormonism, and other religions such as Zoroastrianism, Baha'i, Sikhism, and some Hindu religions.
Judaism and Islam adhere to pure monotheism and therefore do not recognize Christianity as a monotheistic religion. Christianity's claim that God is a Trinity is that there are three persons God, a Person who became human as Jesus. It is a misconception from the viewpoint of Judaism and Islam. Both religions consider God to be the Creator of the entire universe. Therefore, He cannot come in the form of creation. Be it stars, lightning, humans, demigods, holy spirits. or bread and wine
Monotheism believes that there is only one God. Unlike pluralism that believes that there are many gods or gods. But polytheism may also be considered consistent with collective monotheism or in some form of monotheism. The distinction between monotheism and polytheism cannot be clearly defined objectively. unless it adheres to the definition of pure monotheism in Judaism and Islam.
Monotheism is different from Atheism that even worships one god. But it acknowledged that other gods also existed, and unlike bitheism that believed that there were two supreme gods.