We found 33 dictionaries that define the word retrogression:

General (21 matching dictionaries)

1. retrogression: Merriam-Webster
2. retrogression: Oxford Learner's Dictionaries
3. retrogression: American Heritage Dictionary of the English Language
4. retrogression: Collins English Dictionary
5. retrogression: Vocabulary.com
6. Retrogression, retrogression: Wordnik
7. retrogression: Cambridge Advanced Learner's Dictionary
8. retrogression: Wiktionary
9. retrogression: Webster's New World College Dictionary, 4th Ed.
10. retrogression: Infoplease Dictionary
11. retrogression: Dictionary.com
12. retrogression: Online Etymology Dictionary
13. Retrogression: Wikipedia, the Free Encyclopedia
14. Retrogression: Online Plain Text English Dictionary
15. retrogression: Webster's Revised Unabridged, 1913 Edition
16. retrogression: Rhymezone
17. Retrogression: AllWords.com Multi-Lingual Dictionary
18. retrogression: Webster's 1828 Dictionary
19. retrogression: FreeDictionary.org
20. retrogression: Mnemonic Dictionary
21. retrogression: TheFreeDictionary.com

Art (1 matching dictionary)

22. Virginia Tech Multimedia Music Dictionary (No longer online)

Business (1 matching dictionary)

23. retrogression: Legal dictionary

Computing (1 matching dictionary)

24. retrogression: Encyclopedia

Medicine (4 matching dictionaries)

25. retrogression: Merriam-Webster Medical Dictionary
26. Dorland's Illustrated Medical Dictionary (No longer online)
27. online medical dictionary (No longer online)
28. retrogression: Medical dictionary

Miscellaneous (1 matching dictionary)

29. retrogression: Wordcraft Dictionary

Religion (1 matching dictionary)

30. Glossary of spiritual and religious terms (No longer online)

Slang (1 matching dictionary)

31. retrogression: Urban Dictionary

Tech (2 matching dictionaries)

32. Glossary of Meteorology (No longer online)
33. National Weather Service Glossary (No longer online)

(Note: See retrogressions as well.)

Definitions from Wiktionary (retrogression) ▸ noun:  A deterioration or decline to a previous state. ▸ noun:  (biology) A return to a less complex condition. Similar: retroversion, regression, regress, reversion, degeneration, retrogress, backslide, retrogressiveness, back-ganging, retrogradation, more... Opposite: progress, advancement, improvement Phrases: Soil retrogression and degradation, more... Adjectives: economic, moral, such, social, apparent, actual, political, distinct, temporary, non, complete ▸ Word origin ▸ Words similar to retrogression ▸ Usage examples for retrogression ▸ Idioms related to retrogression ▸ Wikipedia articles (New!) ▸ Popular adjectives describing retrogression ▸ Words that often appear near retrogression ▸ Rhymes of retrogression ▸ Invented words related to retrogression