Definition:
The verb "ulcerate" means to develop an ulcer or to cause an ulcer. An ulcer is a sore or a break in the skin or a membrane in the body, and it can be painful. When a part of the body becomes ulcerated, it means that it has developed an ulcer.
"Ulcerate" is often used in medical discussions about health conditions, especially when talking about diseases that cause sores or lesions in the body.
The primary meaning of "ulcerate" is medical, but in a broader sense, it can also imply causing harm or damage to something metaphorically, though this usage is less common.
There are no common idioms or phrasal verbs that directly include "ulcerate," as it is a specific medical term. However, you might encounter phrases like "break down" or "wear away," which can describe processes of decay or damage in a broader sense.
Remember, "ulcerate" is mainly used in medical contexts to describe the development of ulcers.