What is meant by the term distention?

The term "distention" refers specifically to the state of being swollen or expanded, typically as a result of an accumulation of gas, fluid, or other substances in a body part. This definition aligns with the selection that indicates a swelling out of shape. In medical contexts, for instance, distention might occur in the abdomen when excessive gas builds up, leading to discomfort and an appearance of bloating. Understanding this definition can clarify why the other choices do not capture the essence of the term: compressing implies a force that reduces size, normalcy does not relate to any physical change, and deflating suggests reducing air or fluid pressure, which is the opposite of swelling. Thus, the notion of being swollen out of shape characterizes distention effectively.