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pre·​form ˈprē-ˌfȯrm How to pronounce preform (audio)
preformed; preforming; preforms

transitive verb

: to form or shape beforehand
: to bring to approximate preliminary shape and size


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pre·​form ˈprē-ˌfȯrm How to pronounce preform (audio)
plural preforms
: any of various objects of manufacture or handicraft after preliminary shaping: such as
: a rough gemstone that has been cut to approximately its finished size and shape
: a tube produced for the purpose of being molded into a particular form (such as a bottle)

Examples of preform in a Sentence

Recent Examples on the Web
Videos of him filling in for his dad and preforming his dad’s most beloved hits were shared on TikTok. Sara Vallone, Miami Herald, 24 June 2024 Fourth, these methodological issues are compounded by messy EHR data which should be cleaned prior to preforming predictive tasks. Saurabh Gombar, STAT, 21 June 2024 Many later blooming species don’t have preformed flower buds that overwinter underground. Paul Cappiello, The Courier-Journal, 21 June 2024 One downside is that the concrete must be preformed and cannot be poured and set on site. IEEE Spectrum, 8 May 2023 For example, feelings related to fear, such as horror or terror, are cognitively assembled conceptions of one’s situation, rather than preformed, innate mental states inherited from animals. Dean Mobbs, Scientific American, 20 Sep. 2019 But the Hunter for Target line is mass-produced in a factory, using a preformed mold. Abha Bhattarai,, 16 Apr. 2018 The 21-story Hilton Palacio del Rio was built in 202 days, using a crane to lift preformed, furnished room modules into place. Scott Huddleston, San Antonio Express-News, 31 Mar. 2018
Inside the facility, a rotary forge turns red-hot preform hunks of steel and alloy, using mechanical hammers to draw out precise shapes and contours. Hope Hodge Seck, Popular Mechanics, 21 Aug. 2023 In a nutshell, researchers placed hundreds of square silicon microscale digital chips into a preform that created a polymer fiber. Eric Tegler, Forbes, 17 June 2021

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'preform.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History



Latin praeformare, from prae- + formare to form, from forma form

First Known Use


1601, in the meaning defined at sense 1


1931, in the meaning defined above

Time Traveler
The first known use of preform was in 1601

Dictionary Entries Near preform

Cite this Entry

“Preform.” Dictionary, Merriam-Webster, Accessed 17 Jul. 2024.

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