QuoteTheism is broadly defined as the belief in the existence of at least one deity.[1][2] In common parlance, or when contrasted with deism, the term often describes the classical conception of God that is found in monotheism (also referred to as classical theism) — or gods found in polytheistic religions — a belief in God or in gods without the rejection of revelation as is characteristic of deism.
Deity:
Quote
A deity or god is a supernatural being who is considered divine or sacred.
I suppose you could argue about definitions, but not without wholly muddying the waters. Epicureanism in non-theistic.