Monotheist (noun)

A person who believes in the existence of one deity.

Origin:

Late 19th century: from mono- 'one' + theist.

Examples:

1. The monotheist believes in the worship of one all-powerful God.
2. Monotheism is the belief in a single, omniscient, and benevolent deity.
3. The monotheist religion teaches that there is only one true God.
4. Monotheistic traditions include Judaism, Christianity, and Islam.
5. The monotheist adheres to the belief in a single deity, rejecting polytheism and atheism.