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unprecedented

 - 3 dictionary results

un⋅prec⋅e⋅dent⋅ed

  [uhn-pres-i-den-tid]
Use unprecedented in a Sentence
–adjective
without previous instance; never before known or experienced; unexampled or unparalleled: an unprecedented event.
Origin:
1615–25; un- 1 + precedent + -ed 2

Related forms:
un⋅prec⋅e⋅dent⋅ed⋅ly, adverb
un⋅prec⋅e⋅dent⋅ed⋅ness, noun

Synonyms:
unique, extraordinary, exceptional, novel.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To unprecedented
un·prec·e·dent·ed   (ŭn-prěs'ĭ-děn'tĭd)   
adj.  Having no previous example: unprecedented economic growth.
un·prec'e·dent'ed·ly adv.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

unprecedented 
1623, from un- (1) "not" + precedented (see precedent (n.)). In common use from c.1760.
Online Etymology Dictionary, © 2001 Douglas Harper
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