Literal meaning (a seat):
* I sat on a stool while waiting for the doctor.
* The bar stools were covered in plush red velvet.
* The artist used a stool to reach the top of the easel.
Figurative meaning (a bodily function):
* He had to use the stool after eating too much spicy food.
* The doctor ordered a stool sample for analysis.
* The medication caused him to have frequent stools.
Let me know if you'd like to see more examples, or want me to focus on a specific type of sentence!