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Meaning of unwitnessed

un•wit•nessed

Pronunciation: (un-wit'nist), [key]
— adj.
  1. lacking the signature of a witness: an unwitnessed legal document.
  2. not perceived by the senses; not noticed or observed: unwitnessed everyday occurrences.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.