regression

noun

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

Example Sentences

the regression to really childish behavior that boys often undergo when put in large groups
Recent Examples on the Web The Bulldogs started this season ranked third under the assumption there would be a little regression. Ralph D. Russo, ajc, 10 Jan. 2023 So yes, Musk’s Twitter working model is a regression. Time, 17 Dec. 2022 The Eagles are 8-0 after beating the Texans on Thursday night, but is a regression coming soon? Ben Volin, BostonGlobe.com, 5 Nov. 2022 That there’s been a swift, significant regression with the same personnel and scheme. San Diego Union-Tribune, 21 Dec. 2022 Over the decades, investigators used techniques to try and identify her, such as neighborhood canvassing, reviewing thousands of missing persons cases, age-regression drawings and clay-model reconstructions, Bonavolonta said. Antonio Planas, NBC News, 31 Oct. 2022 Why 2022 production could worse: Injury, regression, discontinuity. Dallas News, 14 Feb. 2022 But a significant defensive regression and some offensive struggles have left the Seahawks losers in three of their past four games. Mark Heim | Mheim@al.com, al, 15 Dec. 2022 Louisiana-Lafayette’s regression from last year’s campaign was largely expected after the departures of their head coach and record-setting quarterback. Jace Evans, USA TODAY, 15 Dec. 2022 See More

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.

Word History

First Known Use

1583, in the meaning defined at sense 1

Time Traveler
The first known use of regression was in 1583

Dictionary Entries Near regression

Cite this Entry

“Regression.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/regression. Accessed 30 Jan. 2023.

Kids Definition

regression

noun
re·​gres·​sion ri-ˈgresh-ən How to pronounce regression (audio)
: an act or the fact of regressing

Medical Definition

regression

noun
re·​gres·​sion ri-ˈgresh-ən How to pronounce regression (audio)
: 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 childhoodHavelock Ellis

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