sunly adjective 2adverb 1forms 4 adjective2 •Of, pertaining to, or characteristic of the Sun; solar."Nay, The sun is single, but her eyes are twain, — Twain firmaments that mock with heavenlier hue The heavens' less lordly and less gracious blue, And lit with sunlier sunlight through and through." — 1907 •Sane. adverb1 •In a sunly manner.Hopes that beam the sunliest, Like the wavelet's silver crest, [...] — 1863 formsmore sunly · sunlier · most sunly · sunliest