Definition of retrogressive adjective from the Oxford Advanced American Dictionary

 

retrogressive

 adjective
adjective
NAmE//ˌrɛtrəˈɡrɛsɪv//
 
(formal)(disapproving)
 
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returning to old-fashioned ideas or methods instead of making progress a retrogressive change opposite progressive
See the Oxford Advanced Learner's Dictionary entry: retrogressive