Definition of retrogressive adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌretrəˈɡresɪv//
; NAmE NAmE//ˌretrəˈɡresɪv//
(formal, disapproving)
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returning to old-fashioned ideas or methods instead of making progress a retrogressive change opposite progressive Word Origin mid 17th cent.: from retro- ‘backwards’, on the pattern of progression.
See the Oxford Advanced American Dictionary entry: retrogressive