re·​gres·​sion | \ ri-ˈgre-shən How to pronounce regression (audio) \

Definition of regression

1 : the act or an instance of regressing
2 : a trend or shift toward a lower or less perfect state: such as
a : progressive decline of a manifestation of disease
b(1) : gradual loss of differentiation and function by a body part especially as a physiological change accompanying aging
(2) : gradual loss of memories and acquired skills
c : reversion to an earlier mental or behavioral level
d : a functional relationship between two or more correlated variables that is often empirically determined from data and is used especially to predict values of one variable when given values of the others the regression of y on x is linear specifically : a function that yields the mean value of a random variable under the condition that one or more independent variables have specified values
3 : retrograde motion

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Synonyms & Antonyms for regression



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Examples of regression in a Sentence

the regression to really childish behavior that boys often undergo when put in large groups
Recent Examples on the Web In Tanzania, progress has been achieved in some areas areas like corruption, poverty alleviation, reining in waste, and bloated bureaucracy, but in others there is clear evidence of regression. David E Kiwuwa, Quartz Africa, "Tanzania’s democracy has taken a step backward after a flawed election," 4 Nov. 2020 There was the mathematician’s regression to the mean. Dave Hyde,, "Hyde: Dragic’s big ending reduces Celtics to locker-room shouting match | Commentary," 17 Sep. 2020 But for special education students, the challenges of remote instruction might have even caused regression in certain skill areas. Hallie Miller,, "Coronavirus in Maryland: 5 takeaways from the week," 23 Oct. 2020 The Buckeyes probably want to stick it to those of us who expect some regression. Nathan Baird, cleveland, "Nebraska and Adrian Martinez return to Ohio Stadium in need of new direction: College Football Monday Madness," 19 Oct. 2020 The defensive regression rivaled -- if not exceeded -- the worst points of the 2019 season, when Alabama’s defensive struggles were chalked up, in part, to injuries at inside linebacker. Mike Rodak |, al, "Nick Saban: Dylan Moses played ‘extremely well’ against Georgia," 19 Oct. 2020 The Red Sox expected some regression this season after losing Betts in a trade and ace pitcher Chris Sale to injury. David Brandt, Star Tribune, "Expect the unexpected: MLB's best bats aren't all familiar," 24 Aug. 2020 Tannehill thus far has defied our predictions of regression and is still playing at a very high level while the Titans try to run the ball frequently. Stephanie Stradley, Houston Chronicle, "Stephanie Stradley's Texans-Titans Q&A with Tom Gower," 16 Oct. 2020 Linear regression models were used to take the number of COVID-19 deaths and estimate the likely reproductive number for the virus in each state and DC. John Timmer, Ars Technica, "US states stopped their pandemic social restrictions too soon," 8 Oct. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'regression.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of regression

1583, in the meaning defined at sense 1

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Time Traveler for regression

Time Traveler

The first known use of regression was in 1583

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Statistics for regression

Last Updated

16 Nov 2020

Cite this Entry

“Regression.” Dictionary, Merriam-Webster, Accessed 28 Nov. 2020.

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re·​gres·​sion | \ ri-ˈgresh-ən How to pronounce regression (audio) \

Medical Definition of regression

: a trend or shift toward a lower, less severe, or less perfect state: as
a : 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 skills
c : 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

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