1. Dark and gloomy: Lacking light or brightness and producing a dull, dark, or melancholy atmosphere.
2. Dark in color: Having a color or tone that is dark, dull, or suitable for a serious mood or occasion.
3. Serious and melancholy: Marked by or conveying strict seriousness combined with sadness or a troubled state of mind.
NOTE: Somber is the Canadian and UK spelling of this word. The American version is 'sombre'. The word originated from the Dutch word 'somber', which means about the same.
A somber song, depressing and without variety.