A. The main symptom is a sad mood or a loss of interest in life.

Masked depression was associated with a child "acting out" an angry or sad mood.

In addition, because sad moods can cause people to feel more symptoms of illness, they are likely to visit doctors more often.

Such a sad mood appears in almost all the poems in his almanac.

There's a very sad mood to that song.

The primary symptoms of depression are a sad mood and/or loss of interest in life.

In this sad mood of repletion he could well believe it.

The dark grays and black make for a gloomy, sad mood.

I can understand their leaving, but it leaves me in a very sad mood.