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

 

valiantly

 adverb
adverb
BrE BrE//ˈvæliəntli//
 
; NAmE NAmE//ˈvæliəntli//
 
(especially literary)
 
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in a way that is very brave or determined synonym courageously She tried valiantly to defend him against his critics.