from The American Heritage® Dictionary of the English Language, 4th Edition

  • transitive v. To support with proof or evidence; verify: substantiate an accusation. See Synonyms at confirm.
  • transitive v. To give material form to; embody.
  • transitive v. To make firm or solid.
  • transitive v. To give substance to; make real or actual.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. to verify something by supplying evidence; to corroborate or authenticate
  • v. to give material form or substance to something; to embody

from the GNU version of the Collaborative International Dictionary of English

  • transitive v. To make to exist; to make real.
  • transitive v. To establish the existence or truth of by proof or competent evidence; to verify.

from The Century Dictionary and Cyclopedia

  • To make to exist; make real or actual.
  • To establish by proof or competent evidence; verify; make good: as, to substantiate a charge or an allegation; to substantiate a declaration.
  • To present as having substance; body forth.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. represent in bodily form
  • v. solidify, firm, or strengthen
  • v. make real or concrete; give reality or substance to
  • v. establish or strengthen as with new evidence or facts


from The American Heritage® Dictionary of the English Language, 4th Edition

New Latin substantiāre, substantiāt-, from Latin substantia, substance; see substance.


  • About the worst anyone can substantiate is that Obama derailed another Democrat or two for using fake signatures to get on the ballot.

    Whither McCain on Stevens’ Indictment? - The Caucus Blog -

  • I have waited for many hours now for anyone to substantiate a word of what Shuster said.

    Think Progress » MSNBC’s Shuster: Signs Point To Rove Indictment

  • More-over, those who used his name to substantiate their own pet notions, those who would quote and misquote him endlessly, would find it convenient to forget that it was he who insisted that no canal should be considered until the comparative advantages and disadvantages of all possible routes were examined firsthand by experienced people and according to uniform standards.

    The Path Between the Seas

  • CQ reported that not only were they true, but transcripts of Jane's recorded calls substantiate them.

  • When you concoct facts that aren't there and then insist on them to "substantiate" your ignorance, then don't be surprised if people think you're not rational.

    Nipping the PIE ergative *-s theory right in the bud

  • Another question: what do you mean by "substantiate" If you mean, can they "prove" the validity of NDE, I'd agree that the number is zero.

    The Memory Hole

  • That she insists that I would have to present to her a description of my daily life that meets her standards in order to "substantiate" my position to her satisfaction does, indeed, warrant a responsive demand that she first prove to me she has any standing or authority that I should recognize.

    Archive 2006-07-01

  • Even our Reviewer finds evidence to "substantiate" that, given against George Burroughs, resting on spectres, in his feats of strength, in some malignant neighborhood scandals, and in exaggerated forms of parish or personal animosities.

    Salem Witchcraft and Cotton Mather A Reply

  • Freedom Foundation and Competitive Enterprise Institute to author studies designed to "substantiate" their claims for greater subsidies.


  • • In conjunction with other recently declassified materials, the Phase II report shows that the Bush administration solicited intelligence then used to "substantiate" its public claims.

    Alex Jones' Prison


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