Something that's Illustrious is well known or famous, leaving a trail of glory in its wake. An illustrious career, for example, is full of impressive achievements and celebrated contributions to society.

Coming from the Latin illustris, meaning “bright, distinguished, famous,” illustrious is a powerful adjective. It's similar to luster, which is a brilliant shine — so imagine that something illustrious is as wonderful as a sparkling diamond. Use this word to describe the career or reputation of someone really successful, like a bestselling author or business mogul.

Definitions of illustrious
  1. adjective
    widely known and esteemed
    “an illustrious judge”
    synonyms: celebrated, famed, famous, far-famed, notable, noted, renowned
    apprehended with certainty
  2. adjective
    having or conferring glory
    “an illustrious achievement”
    having or deserving or conferring glory
Word Family

Test prep from the experts

Boost your test score with programs developed by’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.


  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week


  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week


  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week