un·​prov·​en | \ ˌən-ˈprü-vən , British also -ˈprō-\

Definition of unproven

: not tested and shown to be good, true, or useful : not proven an unproven allegation/theory unproven benefits unproven technology

Examples of unproven in a Sentence

Recent Examples on the Web

Those treatments are usually a combination of unproven and experimental therapies. Beth Mole, Ars Technica, "Crowdfunding raises millions for quack cancer remedies, like coffee enemas," 20 Sep. 2018 Does a school bus really need to be the testing ground for new and still relatively unproven technology? Liz Stinson, Curbed, "Florida town is first in the world to test autonomous school shuttles," 19 Sep. 2018 These are, at present, completely unproven therapies for solid tumors. Maggie Fox /, NBC News, "Is chemo obsolete? Not by a long shot, cancer experts say," 24 June 2018 The trials test standard therapies against promising yet unproven therapies. Liz Kowalczyk, BostonGlobe.com, "Teaching hospitals pledge to hire, treat more minorities," 16 Apr. 2018 Venture capital firms know it, giving unproven startups millions of dollars to try to make the best products. Susannah Locke, Vox, "The best of everything," 7 Dec. 2018 In 2011, that figure was about $68 million, meaning companies are paying more for unproven drugs. Charley Grant, WSJ, "What Is Ailing the Drug Industry?," 22 June 2018 The autonomous 16-passenger vehicles zipping through the tunnels at speeds over 100 miles per hour would indeed be the stuff of science fiction, though the Emanuel administration has sought to downplay the more unproven aspects of the project. John Byrne, chicagotribune.com, "Emanuel calls Elon Musk's proposed 12-minute express tunnel to O'Hare 'the fast lane to Chicago's future'," 14 June 2018 The Cougars are unproven at running back behind James Williams and Borghi, so Thomas could take on a Keith Harrington-like role in 2019 — or use his redshirt and slide in next to Borghi as a secondary tailback in 2020. 4. Theo Lawson, The Seattle Times, "NCAA early signing day: These five WSU recruits could make an instant impact for the Cougars," 17 Dec. 2018

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

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First Known Use of unproven

1563, in the meaning defined above

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Statistics for unproven

Last Updated

20 Feb 2019

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Time Traveler for unproven

The first known use of unproven was in 1563

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English Language Learners Definition of unproven

: not tested and shown to be true, good, or useful


un·​prov·​en | \ ˌən-ˈprü-vən\

Legal Definition of unproven

: not proven an unproven allegation

More from Merriam-Webster on unproven

Spanish Central: Translation of unproven

Comments on unproven

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a servile follower or underling

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