groundbreaking

[ground-brey-king]
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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.

Origin of groundbreaking

First recorded in 1905–10; ground1 + break + -ing1, -ing2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


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Word Origin and History for groundbreaking
adj.

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

Online Etymology Dictionary, © 2010 Douglas Harper