Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

stupidity &c 499; want of originality; dearth of ideas. prose, matter of fact; heavy book, conte a dormir debout [Fr.]; platitude. V. be dull &c adj.; prose, take au serieux [Fr.], be caught napping. render dull &c adj.; damp, depress, throw cold water on, lay a wet blanket on; fall flat upon the ear. no joke, serious matter (importance) 642. Adj. dull, dull as ditch water; unentertaining, uninteresting, flat, dry as dust; unfunny, unlively†, logy [U.S.]; unimaginative; insulse†; dry as dust; prosy, prosing, prosaic; matter of fact, commonplace, pedestrian, pointless; weary stale flat and unprofitable [Hamlet]. stupid, slow, flat, insipid, vapid, humdrum, monotonous; melancholic &c 837; stolid &c 499; plodding. boring, tiresome, tedious &c 841. Phr. davus sum non Aedipus†; deadly dull and boring, DDB.