Which term best describes the opposite of corporeal?

The term that best describes the opposite of corporeal is "immaterial." Corporeal refers to something that has a physical presence or is related to the body; it encompasses anything that is tangible and can be perceived through the senses. In contrast, "immaterial" signifies the absence of a physical form, relating to concepts, ideas, or spiritual entities that cannot be physically touched or seen.

Understanding the distinction between corporeal (material and physical) and immaterial highlights the difference between entities that exist in a tangible way and those that do not have a physical presence. This is particularly relevant in discussions that involve philosophy, spirituality, or theoretical concepts where the focus is on non-physical aspects of existence.

While material, visible, and physical all relate to tangible things that can be experienced through the senses, it is the term "immaterial" that correctly captures the essence of being non-physical or lacking a corporeal form.