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[in-tur-puh-leyt] /ɪnˈtɜr pəˌleɪt/
verb (used with object), interpolated, interpolating.
to introduce (something additional or extraneous) between other things or parts; interject; interpose; intercalate.
Mathematics. to insert, estimate, or find an intermediate term in (a sequence).
to alter (a text) by the insertion of new matter, especially deceptively or without authorization.
to insert (new or spurious matter) in this manner.
verb (used without object), interpolated, interpolating.
to make an interpolation.
Origin of interpolate
1605-15; < Latin interpolātus past participle of interpolāre to make new, refurbish, touch up, equivalent to inter- inter- + -polā- verb stem (akin to polīre to polish) + -tus past participle suffix
Related forms
[in-tur-puh-luh-buh l] /ɪnˈtɜr pə lə bəl/ (Show IPA),
interpolater, interpolator, noun
[in-tur-puh-luh-tawr-ee, -tohr-ee] /ɪnˈtɜr pə ləˌtɔr i, -ˌtoʊr i/ (Show IPA),
interpolative, adjective
interpolatively, adverb
noninterpolating, adjective
noninterpolative, adjective
uninterpolated, adjective
uninterpolative, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for interpolated
Contemporary Examples
  • No implausible publication with “interpolated essays on the virtues of sanitary improvement” is beyond his sight.

Historical Examples
  • "The driver he tried for to whip up," interpolated Jem Bottles.

    The O'Ruddy Stephen Crane
  • “Their vaults are, no doubt, in a most insanitary condition,” interpolated the doctor.

    The Nebuly Coat John Meade Falkner
  • "I should like to know exactly what you did say, Robin," I interpolated.

    The Right Stuff Ian Hay
  • “Propped up in bed, to be quite comfortable,” interpolated Georgia.

    Betty Wales Senior Margaret Warde
  • "That your daughter should have all this money," interpolated Beecot.

    The Opal Serpent Fergus Hume
  • "But plants derive nourishment from the soil," interpolated Forrester.

    The Sky Trap Frank Belknap Long
  • "That is precisely what the magistrate did think," M. Louis interpolated.

    Fantmas Pierre Souvestre
  • "He seems to have a curiously apt intelligence," interpolated Challis.

    The Wonder J. D. Beresford
  • "And which you are always glad to get," interpolated Mr. Weil.

    A Black Adonis

    Linn Boyd Porter
British Dictionary definitions for interpolated


to insert or introduce (a comment, passage, etc) into (a conversation, text, etc)
to falsify or alter (a text, manuscript, etc) by the later addition of (material, esp spurious or valueless passages)
(intransitive) to make additions, interruptions, or insertions
(maths) to estimate (a value of a function) between the values already known or determined Compare extrapolate (sense 1)
Derived Forms
interpolater, interpolator, noun
interpolative, adjective
Word Origin
C17: from Latin interpolāre to give a new appearance to, from inter- + polīre to polish
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for interpolated



1610s, "to alter or enlarge (a writing) by inserting new material," from Latin interpolatus, past participle of interpolare "alter, freshen up, polish;" of writing, "falsify," from inter- "up" (see inter-) + polare, related to polire "to smoothe, polish." Sense evolved in Latin from "refurbish," to "alter appearance of," to "falsify (especially by adding new material)." Middle English had interpolen (early 15c.) in a similar sense. Related: Interpolated; interpolating.

Online Etymology Dictionary, © 2010 Douglas Harper
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