Quick, someone call Don Quixote! This is absolutely brilliant in every since of the word. (Okay, maybe not the last two...) –adjective 1. shining brightly; sparkling; glittering; lustrous 2. distinguished; illustrious: a brilliant performance by a young pianist. 3. having or showing great intelligence, talent, quality 4. strong and clear in tone; vivid; bright: brilliant blues and greens; the brilliant sound of the trumpets. 5. splendid or magnificent –noun 6. Jewelry . a gem, especially a diamond, having any of several varieties of the brilliant cut. 7. Printing . a size of type about 3 1 / 2 -point.