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

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 The apparent regression of second-year players Payton Pritchard and Aaron Nesmith should concern the Celtics. Adam Himmelsbach,, 25 Nov. 2021 Still, playing without someone who ranked 18th in the NBA in scoring last year and was the early-season go-to guy has played a substantial role in the offensive regression. Chris Fedor, cleveland, 22 Nov. 2021 Arizona State was a positive regression team to begin with and the Sun Devils seem to be catching USC at the right time. Adam Burke Vsin, Los Angeles Times, 5 Nov. 2021 Veteran right-handers Adam Plutko and César Valdez spent April and May getting big outs in big spots before the regression bug hit them hard. Jon Meoli,, 3 Nov. 2021 New Orleans opened as six-point home favorites in this one, but there’s also the question of possible regression with Jameis Winston at quarterback. Jeremy Cluff, The Arizona Republic, 2 Nov. 2021 Despite the regression, Marin County lifted its indoor mask mandate after reaching other key COVID-19 benchmarks agreed upon by eight Bay Area county health departments, also tied to high vaccination and low hospitalization rates. Aidin Vaziri, San Francisco Chronicle, 2 Nov. 2021 Miami’s regression in its rushing game hasn’t helped, with the Hurricanes averaging 3.2 yards per carry — the worst mark among ACC programs and No. 117 in the nation — after having 4.3 yards per carry last season. Khobi Price,, 22 Sep. 2021 While there’s likely some regression to the mean baked in, a 53.3 percent completion percentage the last two weeks is still concerning. Tim Bielik, cleveland, 10 Oct. 2021

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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Dictionary Entries Near regression



regression analysis

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Statistics for regression

Last Updated

29 Nov 2021

Cite this Entry

“Regression.” Dictionary, Merriam-Webster, Accessed 30 Nov. 2021.

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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

More from Merriam-Webster on regression

Nglish: Translation of regression for Spanish Speakers

Britannica English: Translation of regression for Arabic Speakers Encyclopedia article about regression


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