Definition of massively adverb from the Oxford Advanced Learner's Dictionary

 

massively

 adverb
adverb
BrE BrE//ˈmæsɪvli//
 
; NAmE NAmE//ˈmæsɪvli//
 
 
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to a very large degree or extent; extremely Women have contributed massively to economic growth. massively overpriced/underfunded/outnumbered a massively complicated project