1 extrapolate | Definition of extrapolate

extrapolate

verb
ex·​trap·​o·​late | \ ik-ˈstra-pə-ˌlāt How to pronounce extrapolate (audio) \
extrapolated; extrapolating

Definition of extrapolate

transitive verb

1a : to predict by projecting past experience or known data extrapolate public sentiment on one issue from known public reaction on others
b : to project, extend, or expand (known data or experience) into an area not known or experienced so as to arrive at a usually conjectural knowledge of the unknown area extrapolates present trends to construct an image of the future
2 : to infer (values of a variable in an unobserved interval) from values within an already observed interval

intransitive verb

: to perform the act or process of extrapolating

Keep scrolling for more

Other Words from extrapolate

extrapolation \ ik-​ˌstra-​pə-​ˈlā-​shən How to pronounce extrapolation (audio) \ noun
extrapolative \ ik-​ˈstra-​pə-​ˌlā-​tiv How to pronounce extrapolative (audio) \ adjective
extrapolator \ ik-​ˈstra-​pə-​ˌlā-​tər How to pronounce extrapolator (audio) \ noun

The Many Uses of Extrapolate

Scientists worry about the greenhouse effect because they have extrapolated the rate of carbon-dioxide buildup and predicted that its effect on the atmosphere will become increasingly severe. On the basis of their extrapolations, they have urged governments and businesses to limit factory and automobile emissions. Notice that it's acceptable to speak of extrapolating existing data (to produce new data), extrapolating from existing data (to produce new data), or extrapolating new data (from existing data)—in other words, it isn't easy to use this word wrong.

Examples of extrapolate in a Sentence

We can extrapolate the number of new students entering next year by looking at how many entered in previous years. With such a small study it is impossible to extrapolate accurately.

Recent Examples on the Web

Using that number and the number of days each inmate has spent in jail to extrapolate the cost of each judge’s docket, Russo’s docket has racked up $1.3 million in taxpayer expense, far outpacing any other judge. Cory Shaffer, cleveland.com, "One Cuyahoga County judge’s contribution to jail crowding: 13 inmates awaiting trial for more than 400 days," 19 Aug. 2019 People were sort of extrapolating based on Tarantino’s dubious record with depictions of violence and violence against women. Mark Olsen, Los Angeles Times, "The ‘Once Upon A Time... In Hollywood’ ending, explained," 26 July 2019 Recency effect is the tendency to extrapolate the most recent trend into infinity. Nancy Tengler, USA TODAY, "For successful investing, what's the trait you need most?," 23 July 2019 But Mason said the new report can’t be used to extrapolate the total spilled from the Taylor site. Washington Post, "Hidden oil spill: New study contradicts owner’s claims," 24 June 2019 Like virtually everything relating to Colorado weather, be careful with over-extrapolating from these types of signals. Chris Bianchi, The Denver Post, "Bye bye, El Niño: What does that mean for this winter in Colorado?," 10 Aug. 2019 Not to mention how to extrapolate the effects of the drug on people over 70, the maximum age at which the study enrolled patients. Michael Nedelman, CNN, "Chemo-free drug combo shows 'dramatic' improvement against common leukemia in adults," 31 July 2019 The team could therefore use models employed by linguists to analyze their data on minerals and extrapolate how many undiscovered minerals might exist on Earth. Quanta Magazine, "How Life and Luck Changed Earth’s Minerals," 11 Aug. 2015 The scientists then extrapolated across the globe to find where environment variables were likely to support populations of the animals—and how that will change with global warming. Douglas Main, National Geographic, "Raccoons are spreading across Earth—and climate change could help," 29 July 2019

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

See More

First Known Use of extrapolate

1874, in the meaning defined at transitive sense 2

History and Etymology for extrapolate

Latin extra outside + English -polate (as in interpolate) — more at extra-

Keep scrolling for more

Keep scrolling for more

More Definitions for extrapolate

extrapolate

verb

English Language Learners Definition of extrapolate

formal : to form an opinion or to make an estimate about something from known facts

Keep scrolling for more