Meaning of unsubstantiated

un•sub•stan•ti•at•ed

Pronunciation: (un"sub-stan'shē-ā"tid), [key]
— adj.
  1. not substantiated; unproved or unverified: unsubstantiated allegations.
  2. being without form or substance.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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