
The understanding of the nature and causes of depression has evolved over the centuries, though this understanding is incomplete and has left many aspects of depression as the subject of discussion and research. Proposed causes include psychological, psycho-social, hereditary, evolutionary and biological factors. Long-term substance abuse may caus...
Found on
http://en.wikipedia.org/wiki/Major_depressive_disorder

a mood disorder characterized by the occurrence of one or more major depressive epsiodes and the absence of any history of manic, mixed, or hypomanic episodes.
Found on
http://www.encyclo.co.uk/local/21001

A severe mental illness characterized by feelings of hopelessness, helplessness, and worthlessness;
Found on
http://www.encyclo.co.uk/local/22394

Type: Term Definitions: 1. a DSM diagnosis that is established when the specified criteria are met. Synonyms: major depression
Found on
http://www.medilexicon.com/medicaldictionary.php?t=26020

A depressive disorder commonly referred to as depression. Depression is more than simply being sad; to be diagnosed with depression, a person must have five or more characteristic symptoms nearly every day for a two-week period.
Found on
https://www.encyclo.co.uk/local/22569

A mood disorder characterized by intense feelings of depression over an extended time, without the manic high phase of bipolar depression.
Found on
https://www.encyclo.co.uk/local/22842

A disorder diagnosed after at least one major depressive episode.
Found on
https://www.sparknotes.com/psychology/psych101/glossary/terms/
No exact match found.