Word of the Week: effulgent (ĭ-FŎŎL-jənt) Definition (Adjective) Shining forth brilliantly; sending forth intense light; resplendent, radiant. In Context "And it blazed with a light that was like that of the sun – very splendid and effulgent – so that they could scarcely look upon the splendor thereof." Howard Pyle, The Story of the Grail and the Passing of Arthur, 1910.