WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / I / illustriousness illustriousness noun 15 letters Scrabble 15 WWF 20 Definitions noun the property possessed by something or someone of outstanding importance or eminence greatness Look “illustriousness” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →