[uhn-suh b-stan-shee-ey-tid]


not substantiated; unproved or unverified: unsubstantiated allegations.
being without form or substance.

Origin of unsubstantiated

First recorded in 1765–75; un-1 + substantiate + -ed2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unsubstantiated

Contemporary Examples of unsubstantiated

Historical Examples of unsubstantiated

  • As yet he could not reveal his unsubstantiated information to another.

    The Roof Tree

    Charles Neville Buck

  • He conscientiously avoids the vague, the doubtful, the unsubstantiated.

  • The articles seemed woven of fact, but she could not accept them unsubstantiated.

    To Him That Hath

    Leroy Scott

  • But he couldn't prove it, and she wasn't likely to accept his unsubstantiated word.

    Forget Me Nearly

    Floyd L. Wallace

  • Then follows the unsubstantiated story which has done duty for Shakspeare and many other poets.

    Robert Burns

    Gabriel Setoun

British Dictionary definitions for unsubstantiated



not established as valid or genuineunsubstantiated allegations
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

Word Origin and History for unsubstantiated

1775, from un- (1) "not" + past participle of substantiate (v.).

Online Etymology Dictionary, © 2010 Douglas Harper