| Lacklustre 1. (n.) A want of luster. 2. (a.) Wanting luster or brightness. Thesaurus Entries blah, bland, boring, colorless, dense, dingy, dismal, drab, dreary, dull, flat, insipid, prosaic, slow, tedious, thick, tiresome, two-dimensional, unexciting, unimaginative, uninteresting, vapid, wearisome, wishy-washy |