Definition of groundbreaking adjective from the Oxford Advanced Learner's Dictionary

 

groundbreaking

 adjective
adjective
BrE BrE//ˈɡraʊndbreɪkɪŋ//
 
; NAmE NAmE//ˈɡraʊndbreɪkɪŋ//
 
[only before noun]
 
jump to other results
making new discoveries; using new methods a groundbreaking piece of research
See the Oxford Advanced American Dictionary entry: groundbreaking