somber UK /ˈsɒmbə/US /ˈsɑmbɚ/adjective 4noun 1verb 1forms 5 adjective4 •Dark; gloomy; shadowy, dimly lit. •Melancholic, gloomy, dreary, dismal; grim.The dinner was silent and sombre; happily it was also short. — 1845 •Grave; extremely serious. •Dull or dark in colour or brightness. noun1 •(no longer used) Gloom; obscurity; duskiness. verb1 •To make sombre or dark; to make shady. formssombered · sombering · sombers · somberer · somberest