from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. One that is original or innovative.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. First person to do, make or fight for something. A pioneer; a seminal person.

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

  • n. someone who helps to open up a new line of research or technology or art


From ground +‎ breaker. (Wiktionary)



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