gainly adjective 4adverb 2forms 4 adjective4 •Graceful; tactful. •(humorous) Shapely; handsome. •(dialect, UK) Proper; suitable; becoming. •(no longer used) Ready to help; kindly; gracious. adverb2 •Suitably; fitly; conveniently; readily. •Thoroughly; completely; (with adjectives) very. formsgainlier · more gainly · gainliest · most gainly