without previous instance; never before known or experienced; unexampled or unparalleled: an unprecedented event.

Origin of unprecedented

First recorded in 1615–25; un-1 + precedent + -ed2
Related formsun·prec·e·dent·ed·ly, adverbun·prec·e·dent·ed·ness, noun

Synonyms for unprecedented

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unprecedentedly

Contemporary Examples of unprecedentedly

Historical Examples of unprecedentedly

  • Those materials can now be had at an unprecedentedly low price.

  • I came out at the very worst time of year, and the weather has been (of course) ‘unprecedentedly’ bad and changeable.

    Letters from the Cape

    Lady Duff Gordon

  • The next day was fine, but after that the weather was unprecedentedly bad, considering that it ought to have been the dry monsoon.

    The Malay Archipelago

    Alfred Russell Wallace

  • On the whole, it certainly was to the credit of the regiment that she should be so universally and unprecedentedly admired.

  • In spite of the very inopportune change in the direction of the wind, we had had an unprecedentedly quick passage.

    Visit to Iceland

    Ida Pfeiffer

British Dictionary definitions for unprecedentedly



having no precedent; unparalleled
Derived Formsunprecedentedly, 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

Word Origin and History for unprecedentedly



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

Online Etymology Dictionary, © 2010 Douglas Harper