a. rare1. Somewhat somber.

1

a. 1845.  Barham, Ingol. Leg., Ser. III. Knt. & the Lady (1905), 471. Her thoughts having taken a sombre-ish train.

2

1883.  Elizabeth P. Allen, in Continent, III. 184/1. ‘But oh for a touch of color!’ sighed the girl with true instinct, for the somberish dress needed it.

3