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

  

revolutionary

 noun
noun
BrE BrE//ˌrevəˈluːʃənəri//
 
; NAmE NAmE//ˌrevəˈluːʃəneri//
 
 
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(pl. revolutionaries) a person who starts or supports a revolution, especially a political one socialist revolutionaries Like the French revolutionaries, his main concern was to unify the country. The revolutionaries tried to encourage soldiers to mutiny or desert.
See the Oxford Advanced American Dictionary entry: revolutionary