Anorexia can refer to:
- Eating conditions
- Anorexia (symptom), the symptom of poor appetite whatever the cause
- Anorexia nervosa, an eating disorder of excessive weight loss and usually undue concern about body shape
- Anorexia mirabilis, referring almost exclusively to women and girls of the Middle Ages who would starve themselves, sometimes to the death, in the name of God
- Relationships
- Sexual anorexia, a term used to describe a lack of "appetite" for romantic-sexual interaction
- Music