Clinical Nurse Specialist, RN. After graduating from nursing school in Japan, I worked for two years in a large Tokyo hospital.
The definition of a stool is a seat without arms supported by three or four legs. An example of a stool is a seat that you'd sit on at a bar. Stool is the waste matter in a bowel movement. An example of stool is the source of the sample provided to a medical lab to check for stomach parasites. a piece of furniture for one person to sit on, typically having a round seat, three or four legs or a central post, and no back or arms.
Everybody poops! Stool, or feces, is what we call the waste material that leaves the body. We all must eat, and when we do, food is broken down. But it's not broken down fully, there is something left over, and that material must leave the body. But our food goes through a lot of changes before it becomes stool.