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

 

progressive

 noun
noun
BrE BrE//prəˈɡresɪv//
 
; NAmE NAmE//prəˈɡresɪv//
 
 
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[usually plural] a person who is in favour of new ideas, modern methods and change political battles between progressives and conservatives Word Origin early 17th cent.: from French progressif, -ive or medieval Latin progressivus, from progress- ‘gone forward’, from the verb progredi, from pro- ‘forward’ + gradi ‘to walk’.
See the Oxford Advanced American Dictionary entry: progressive