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groundbreaking

[ground-brey-king] /ˈgraʊndˌbreɪ kɪŋ/
noun
1.
the act or ceremony of breaking ground for a new construction project.
adjective
2.
of or pertaining to such a ceremony.
3.
originating or pioneering a new endeavor, field of inquiry, or the like:
Pasteur's groundbreaking work in bacteriology.
Origin
1905-1910
1905-10; ground1 + break + -ing1, -ing2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ground-breaking

ground-breaking

adjective
1.
innovative: a ground-breaking novel
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for ground-breaking

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
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8
11
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