Phil., physiol., med., alch.: (a) To change, modify, transform; alteraten to (sth.); (b) to change for the worse; affect adversely; deteriorate; (c) to change for the better; affect beneficially……
Physiol. & psych. An inherent urge or drive attributed to the various organs of the body (such as the genitals, the stomach, the senses), to the mental 'faculties', or to the organism as a whole……
