Definition of trailblazer noun from the Oxford Advanced Learner's Dictionary

 

trailblazer

 noun
noun
BrE BrE//ˈtreɪlbleɪzə(r)//
 
; NAmE NAmE//ˈtreɪlbleɪzər//
 
 
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a person who is the first to do or discover something and so makes it possible for others to follow a trailblazer in the field of genetic engineering compare blaze a trail
See the Oxford Advanced American Dictionary entry: trailblazer