the process of returning to an earlier state, typically a worse one 倒退,退化,衰退,恶化 a kind of extreme retrogression to 19th-century attitudes. 朝着19世纪观点的某种急剧倒退。
(Astronomy). another term for retrogradation (天文)。 同 retrogradation
派生 retrogressive adjective 语源
mid 17th cent.: from retro- 'backwards', on the pattern of progression