1. A general lack or loss of appetite for food; especially, when caused by a disease: "Doctors are concerned because too often anorexia is a serious medical condition in which the patient chooses to abstain from food or consumes a minimum of calories that too often results in hospitalization or premature death."

"Apparently, anorexia affects girls or young women more often the males."

2. No appetite; also, a shortened term for anorexia nervosa: "Her cousin who is a pediatrician, specializes in anorexia therapy and works with young women who are unable to overcome their anxieties about food."