not generally used as a medical term, survivor can have different meanings when applied to people with cancer. Some people use the word to refer to anyone who has ever been diagnosed with cancer. For example, someone living with cancer may be considered a survivor. Some people use the term to refer to someone who has completed cancer treatment. Others call a person a survivor if he or she has lived several years past a cancer diagnosis. The American Cancer Society believes that each person has the right to define his or her own experience with cancer and considers a cancer survivor to be anyone who describes himself or herself this way, from diagnosis throughout the rest of his or her life.