from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Being among the best or foremost in the world; of an international standard of excellence.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective of a standard that ranks among the best in the world
  • adjective of the highest order or importance

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective ranking above all others


Sorry, no etymologies found.


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  • I like your word Katie :) This is a very relative word for Outliers, because when someone spends 10,000 hours doing something they will become world-class! I think that being World-Class is definitely more interesting than being a professional!

    September 28, 2011

  • September 28, 2011