the GNU version of the Collaborative International Dictionary of English
adj. Gloomy; somber.
The Century Dictionary and Cyclopedia
Somber; gloomy.
Word Usage
"The sombrous and heavy sound of the billows, successively dashing against the rocky beach at a profound distance beneath, was to the ear what the landscape was to the eye — a symbol of unvaried and monotonous melancholy, not unmingled with horror."