Development of womanlike changes (e.g., breast enlargement, loss of facial hair) in a male because of endocrine (hormonal) disorder or the administration of certain drugs.
The development of female secondary sexual characteristics (enlargement of the breasts, loss of facial hair, and fat beneath the skin) in the male, either as a result of an endocrine disorder or of hormone therapy.
The normal development of female secondary sexual characteristics, or the pathological development of these in a man.
The emergence of typically female secondary sexual traits in a male, including breast enlargement, subcutaneous fat accumulation, and the loss of facial hair, is known as feminization. This condition can be attributed either to a hormonal imbalance or to hormone therapy.