lacking brightness or color; dull; "drab faded curtains"; "sober Puritan grey"; "children in somber brown clothes"
lacking in liveliness or charm or surprise; "her drab personality"; "life was drab compared with the more exciting life style overseas"; "a series of dreary dinner parties"
not characteristic of or befitting a profession or one engaged in a profession; "described in unprofessional language so that high school students could understand it"; "was censured for unprofessional conduct"; "unprofessional repairs"