dark 9 antonyms and opposites of dark. Adj — Having little or no light. Synonyms for dark blear caliginous cimmerian crepuscular darkling darksome dim dimpsy dingy dull dusky gloomy fuliginous infernal leaden lightless mirksome murky murksome obscure shady somber sombrous stygian sunless tenebrose swarthy tenebrous twilightish umbrageous unilluminated evenfall mirkning Antonyms for dark bright light glowing lit luminous luminiferous radiant shining sunny ← Back to the full definition of dark