What I got...

I don't know if this is any help to anyone but this is what I have:

Clinical depression (also called major-depressive disorder or unipolar depression) is a common psychiatric disorder, characterized by a pervasive low mood, loss of interest in usual activities and diminished ability to experience pleasure.

Although the term "depression" is commonly used to describe a temporary depressed mood when one "feels blue", clinical depression is a serious and often disabling condition that can significantly affect a person's work, family and school life, sleeping and eating habits, general health and ability to enjoy life.[1] The course of clinical depression varies widely: depression can be a once in a life-time event or have multiple recurrences, it can appear either gradually or suddenly, and either last for a few months or be a life-long disorder. Having depression is a major risk factor for suicide; in addition, people with depression suffer from higher mortality from other causes.[2]

Clinical depression may be isolated or be a secondary result of a primary condition such as bipolar disorder or chronic pain. When specific treatment is indicated, this is usually psychotherapy and/or antidepressants.

Clinical depression can present with a variety of symptoms, however almost all patients display a marked change in mood, a deep feeling of sadness, and a noticeable loss of interest or pleasure in favorite activities. Other symptoms include:

* Persistent sad, anxious, or "empty" mood
* Loss of appetite and/or weight loss, or conversely overeating and weight gain
* Insomnia, early-morning awakening, or oversleeping
* Restlessness or irritability
* Feelings of worthlessness, inappropriate guilt, helplessness
* Feelings of hopelessness, pessimism
* Difficulty thinking, concentrating, remembering, or making decisions
* Thoughts of death or suicide or attempts at suicide
* Loss of interest or pleasure in hobbies and activities that were once enjoyed, including sex
* Decreased energy, fatigue, feeling "slowed down" or sluggish
* Persistent physical symptoms that do not respond to treatment, such as headaches, digestive disorders, and chronic pain

Not all patients will present every symptom, and the severity of symptoms will vary widely among individuals. Symptoms must, however, persist for at least two weeks before being considered a potential sign of depression, with the exception of suicidal thoughts or attempts.

(Wikipedia)