[ ik-strap-uh-ley-shuh n ]
/ ɪkˌstræp əˈleɪ ʃən /


an act or instance of inferring an unknown from something that is known.
Statistics, Mathematics. the act or process of estimating the value of a variable or function outside the tabulated or observed range.

Origin of extrapolation

First recorded in 1870–75; extrapolat(e) + -(t)ion
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for extrapolation

Word Origin and History for extrapolation



by 1867, from extra- + back half of interpolation; original sense was "insert intermediate terms in a mathematical series." Transferred sense of "drawing a conclusion about the future based on present tendencies" is from 1889. Cf. extrapolate.

Online Etymology Dictionary, © 2010 Douglas Harper

Culture definitions for extrapolation


[ (ik-strap-uh-lay-shuhn) ]

A mathematical procedure designed to enable one to estimate unknown values of a parameter from known values. A common method of extrapolation is to look at data on a curve, then extend the curve into regions for which there is no data. Extrapolation is often used to predict the future.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.