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[uhn-pres-i-den-tid] /ʌnˈprɛs ɪˌdɛn tɪd/
without previous instance; never before known or experienced; unexampled or unparalleled:
an unprecedented event.
Origin of unprecedented
1615-25; un-1 + precedent + -ed2
Related forms
unprecedentedly, adverb
unprecedentedness, noun
unique, extraordinary, exceptional, novel. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for unprecedented
Contemporary Examples
Historical Examples
  • Against this unprecedented breach of privilege parliament sent a deputation humbly to remonstrate; but all to no purpose.

  • He would raise horses, he declared, on an unprecedented scale.

  • He would set impositions of unprecedented length, and revile himself for ruining the victim's handwriting.

    Sinister Street, vol. 1 Compton Mackenzie
  • For my unprecedented action I claim that no other course lay open to me.

    1914 John French, Viscount of Ypres
  • Let the celebration be of unprecedented splendour, so that the Master may be filled with wonder.

    Chaitanya's Life And Teachings Krishna das Kaviraja
British Dictionary definitions for unprecedented


having no precedent; unparalleled
Derived Forms
unprecedentedly, adverb
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
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Word Origin and History for unprecedented

1620s, from un- (1) "not" + precedented. In common use from c.1760.

Online Etymology Dictionary, © 2010 Douglas Harper
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