Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary

regression

play
noun re·gres·sion \ri-ˈgresh-ən\

Medical Definition of regression

  1. :  a trend or shift toward a lower, less severe, or less perfect state: asa:  progressive decline (as in size or severity) of a manifestation of disease <tumor regression following radiation>b (1):  a gradual loss of differentiation and function by a body part especially as a physiological change accompanying aging <menopausal regression of the ovaries> (2):  gradual loss (as in old age) of memories and acquired skillsc:  reversion to an earlier mental or behavioral level or to an earlier stage of psychosexual development in response to organismic stress or to suggestion <a protective regression towards childhood—Havelock Ellis>





Seen and Heard

What made you want to look up regression? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to work hard

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

prompt angry oily maudlin
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ