(1):

(a.) Dull; dusky; somewhat dark; gloomy; as, a somber forest; a somber house.

(2):

(a.) Melancholy; sad; grave; depressing; as, a somber person; somber reflections.

(3):

(n.) Gloom; obscurity; duskiness; somberness.

(4):

(v. t.) To make somber, or dark; to make shady.