depressing in character or appearance; "drove through dingy streets"; "the dismal prison twilight"- Charles Dickens; "drab old buildings"; "a dreary mining town"; "gloomy tenements"; "sorry routine that follows on the heels of death"- B
Dingy clothes, curtains, or furnishings look dirty or dull. wallpaper with stripes of dingy yellow. dark, dirty, and in bad condition (Perhaps from dungy (15-19 centuries), from dung)