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English definition of “groundbreaking”

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groundbreaking

adjective uk ( also ground-breaking)   /ˈɡraʊndˌbreɪ.kɪŋ/ us  
If something is groundbreaking, it is very new and a big change from other things of its type: His latest movie is interesting, but not groundbreaking.
(Definition of groundbreaking from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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