Which term best describes a state where the body is not functioning normally?

The term that best describes a state where the body is not functioning normally is "disease." In this context, disease refers to a pathological condition resulting from an abnormality in the body's structure or function. This can manifest through various signs and symptoms that indicate a departure from what is considered typical health.

Health is generally understood as the state of complete physical, mental, and social well-being, leading to the opposite of disease. Wellness typically refers to an active process of becoming aware of and making choices toward a healthy and fulfilling life; it's more about the pursuit of health rather than a specific state of bodily function.

Condition, while it can refer to a state of the body that may not meet the standard norms, is a broader term that isn't specifically tied to the presence of dysfunction or disease. It could refer to any number of states, both positive and negative. Thus, "disease" specifically captures the essence of an abnormal physiological state.