unproven

adjective

un·​prov·​en ˌən-ˈprü-vən 

British also -ˈprō-

: 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

Speculation was rife; one unproven theory was that someone had heated the sensor with a hairdryer. — Laura Paddison, CNN Money, 17 July 2026

Continuing the leaguewide trend of hiring young, unproven offensive coordinators, Sirianni turns to Mannion in hopes that this Matt LaFleur disciple can help restore balance, effectiveness and greater unpredictability to the Eagles’ offense. — Mike Jones, New York Times, 14 July 2026

However, more ambitious claims that GLP-1s actively prevent cancer or improve survival after diagnosis remain unproven. — Ziyad Al-Aly, The Conversation, 13 July 2026

Ethical issues also include informed consent from tissue donors, the regulation of experimental therapies, the marketing of unproven stem-cell treatments, and equitable access to emerging regenerative medicines. — Encyclopedia Britannica, 10 July 2026

Word History

First Known Use

1563, in the meaning defined above

Rhymes for unproven

• proven

Legal Definition

unproven

adjective

un·​prov·​en

ˌən-ˈprü-vən

: not proven

an unproven allegation