1. the entire physical structure of an organism, such as the human body.

2. the physical body as opposed to the mental processes of a human being. See mind–body problem.

3. the trunk or torso of a human or nonhuman animal.

4. the main part of a structure or organ, such as the body of the penis.

5. a discrete anatomical or cytological structure, such as the Barr body (see sex chromatin).