Religious naturalism is a framework for religious orientation in which a naturalist worldview is used to respond to types of questions and aspirations that are parts of many religions. It has been described as "a perspective that finds religious meaning in the natural world."

In philosophy, naturalism is the idea that only natural laws and forces operate in the universe. In its primary sense, it is also known as ontological naturalism, metaphysical naturalism, pure naturalism, philosophical naturalism and antisupernaturalism. "Ontological" refers to ontology, the philosophical study of what exists. Philosophers often treat naturalism as equivalent to materialism.