Depression is a mental illness that can affect how people feel, think, and act.
What is Depression? - News/Blog - Stepping Stones of Rockford, Inc.
Depression: Clinical and Major Depression Disorders
Depression - National Institute of Mental Health (NIMH)
What is depression?
What is depression? - Helen M. Farrell
What is Depression – Counseling Connection
What is depression? This chart perfectly describes the symptoms.
The effects of depression on the body and physical health
Depression: Causes and Risk Factors
What Is Depression? Know The Types, Signs, Causes, Complications