groundbreaking


noun

  1. the act or ceremony of breaking ground for a new construction project.

adjective

  1. of or relating to such a ceremony.
  2. originating or pioneering a new endeavor, field of inquiry, or the like: Pasteur’s groundbreaking work in bacteriology.
adj.

1907 as a figurative adjective, from expression to break ground, either for planting or for building; see ground (n.) + break (v.).

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