By Gillian Fournier

A lack of pleasant feelings during normally pleasurable events such as social interaction, eating, or sex. This state is caused by a sheer lack of joy during extreme bouts of depression. One of the factors that has been linked to this condition is stress.

Example: He used to be the life of the party, but he never seems happy to see us anymore.

    Last reviewed: By John M. Grohol, Psy.D. on 10 Aug 2010