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Meaning of groundbreaking

ground•break•ing

Pronunciation: (ground'brā"king), [key]
— n.
  1. the act or ceremony of breaking ground for a new construction project.
—adj.
  1. of or pertaining to such a ceremony.
  2. originating or pioneering a new endeavor, field of inquiry, or the like: Pasteur's groundbreaking work in bacteriology.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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