interpolate

American  

[in-tur-puh-leyt] / ɪnˈtɜr pəˌleɪt /

verb (used with object)

• interpolates,
  present (3rd person singular)
• interpolated,
  past participle,  past
• interpolating
  present participle

1. to introduce (something additional or extraneous) between other things or parts; interject; interpose; intercalate.

2. Mathematics. to insert, estimate, or find an intermediate term in (a sequence).

3. to alter (a text) by the insertion of new matter, especially deceptively or without authorization.

4. to insert (new or spurious matter) in this manner.

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verb (used without object)

• interpolates,
  present (3rd person singular)
• interpolated,
  past participle,  past
• interpolating
  present participle

1. to make an interpolation.

interpolate British  

/ ɪnˈtɜːpəˌleɪt /

verb

1. to insert or introduce (a comment, passage, etc) into (a conversation, text, etc)

2. to falsify or alter (a text, manuscript, etc) by the later addition of (material, esp spurious or valueless passages)

3. (intr) to make additions, interruptions, or insertions

4. maths to estimate (a value of a function) between the values already known or determined Compare extrapolate

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Other Word Forms

Derived Forms

• interpolater
  noun
• interpolator
  noun
• interpolable
  adjective
• interpolative
  adjective
• interpolatory
  adjective
• noninterpolating
  adjective
• noninterpolative
  adjective
• uninterpolated
  adjective
• uninterpolative
  adjective
• interpolatively
  adverb

Inflected Forms

Participles

• interpolating
  present
• interpolated
  past

Conjugated Forms

Present

• interpolate
  simple
• interpolates
  simple
• have interpolated
  perfect
• has interpolated
  perfect
• am interpolating
  progressive
• are interpolating
  progressive
• is interpolating
  progressive
• have been interpolating
  perfect progressive
• has been interpolating
  perfect progressive

Past

• interpolated
  simple
• had interpolated
  perfect
• was interpolating
  progressive
• were interpolating
  progressive
• had been interpolating
  perfect progressive

Future

• will interpolate
  simple
• will have interpolated
  perfect
• will be interpolating
  progressive
• will have been interpolating
  perfect progressive

Etymology

Origin of interpolate

First recorded in 1605–15; from Latin interpolātus, past participle of interpolāre “to make new, refurbish, touch up,” equivalent to inter- “between, among, together” + -polā- verb stem (akin to polīre “to polish”) + -tus past participle suffix; see inter-, polish

Explanation

When you interpolate words into a text, you alter the text by adding words in. If you’re describing your favorite novelist's work, you might interpolate a few examples of her writing into your description. If you constantly interpolate your own snide comments into your sister's play-by-play account of an important basketball game, don't be surprised if she asks you to knock it off. In math, to interpolate means to estimate the value of something given certain data. If you’re looking at a chart that gives the level of pollutants in a lake on January 1st and February 1st, you must interpolate the level for January 15th.

Example Sentences

See Examples For:

interpolate interpolates interpolated interpolating

To get around that issue, the BEA said that it will average September and November numbers to interpolate the October missing data.

From The Wall Street Journal ● Jan. 7, 2026

I have no idea, but when somebody wants to interpolate or whatever it’s called, I never object because I always learn something about the song that I hadn’t known or anticipated.

From Los Angeles Times ● Nov. 11, 2024

This ability to interpolate also leads to highly accurate scene reconstructions when combined with multibounce lidar, Klinghoffer says.

From Science Daily ● Jun. 18, 2024

As Swain explained, “we don’t have thermometers covering every square inch of the Earth,” so scientific groups use computer models to interpolate between data points, generating what is called a reanalysis.

From Scientific American ● Jul. 11, 2023

He was also told to interpolate the series with a 'blank', that is, to think of nothing at all.

From Clever Hans (The horse of Mr. Von Osten): A contribution to experimental animal and human psychology by Oskar Pfungst

He frequently interpolates lyrics from other rappers, quoting artists like J Hus and Skepta.

From BBC ● Jan. 8, 2026

Beyoncé interpolates a bit of “Good Vibrations” on her hit “Cowboy Carter” album, while Lana Del Rey turned up with the band at last month’s Stagecoach country music festival in Indio.

From Los Angeles Times ● May 24, 2024

He says that when he dropped the fiery “Dientes” in September, the ‘00s club-inspired Latino urbano track which interpolates Usher’s “Yeah!,” his fans were expecting reggaeton - his “original sound,” as he puts it.

From Washington Times ● Dec. 7, 2023

Travitz appreciates that the band covers songs and interpolates snippets of others into its tunes.

From Seattle Times ● Aug. 6, 2023

"I am indeed of your opinion-of your way of thinking, most certainly," interpolates Madame Montford, a shadow of melancholy darkening her countenance.

From Justice in the By-Ways, a Tale of Life by F. Colburn (Francis Colburn) Adams

Additional Vivaldi arias and ensembles are deftly interpolated among the scrambled “Seasons” movements, their words a combination of Ms. Ruhl’s new English texts and the original Italian and Latin.

From The Wall Street Journal ● Dec. 22, 2025

But because I can’t express things without some degree of humor, I interpolated Jimi Hendrix’s cover of the national anthem with “La Cucaracha.”

From Los Angeles Times ● Sep. 26, 2023

It was “Rapper’s Delight,” which interpolated Chic’s hit “Good Times.”

From Seattle Times ● Aug. 7, 2023

You can call this thing a memoir — she spoke it, in 1986, to Kurt Loder, who interpolated it as literature.

From New York Times ● May 25, 2023

And if its plain provisions shall now be disregarded, and these new doctrines interpolated in it, it will become as feeble and helpless a being as enemies, whether early or more recent, could possibly desire.

From The Crisis of Eighteen Hundred and Sixty-One In The Government of The United States. Its Cause, and How it Should be Met by A. D. Steight

Set to a throbbing synth bassline, the song teases fans by interpolating a line from her 1980s classic Into The Groove: "Out here on the dance floor, I feel so free."

From BBC ● Apr. 15, 2026

“Old Dog” is a tribute to Mr. Cole’s home state, featuring rapper Petey Pablo interpolating his 2001 North Carolina anthem “Raise Up.”

From The Wall Street Journal ● Feb. 10, 2026

Online, he has a reputation for interpolating corporate PR with nerdy puns and — in his words — “dank” memes.

From Los Angeles Times ● May 24, 2023

It was the perfect recipe for virality: one part cute kid plus one part delicious food, with a healthy sprinkling of catchy sound bites, perfect for interpolating.

From Seattle Times ● Sep. 25, 2022

Most Ainu of Volcano Bay understand Japanese, and they also speak it, interpolating Ainu words when necessary, so I began a conversation.

From Alone with the Hairy Ainu or, 3,800 miles on a pack saddle in Yezo and a cruise to the Kurile Islands. by A. H. Savage Landor