Word of the Week Effulgence Definition: radiant splendor, brilliance. Merriam-Webster Online. Advertisements Share this post!FacebookTwitterGoogleTumblrLinkedInEmailLike this:Like Loading... Published by Tilden Preparatory School Tilden Preparatory School is a college preparatory school for grades 6-12. We have campuses in Albany and Walnut Creek, California. View all posts by Tilden Preparatory School