Definitions:

1. Refers to the development of an open sore that fails to heal properly and often becomes inflamed, infected, and painful. NOUN
   • The pressure sore had progressed to a severe ulceration.
2. The process in which an ulcer forms on the skin or mucous membrane due to the breakdown or erosion of the tissue. NOUN
   • The doctor observed significant ulceration around the wound, which required immediate treatment to prevent infection.

Synonyms:

• canker
• chancre
• infection
• lesion
• sore
• ulcer