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Synonyms

unprecedented

American  
[uhn-pres-i-den-tid] / ʌnˈprɛs ɪˌdɛn tɪd /

adjective

  1. without previous instance; never before known or experienced; unexampled or unparalleled.

    an unprecedented event.

    Synonyms:
    novel, exceptional, extraordinary, unique

unprecedented British  
/ ʌnˈprɛsɪˌdɛntɪd /

adjective

  1. having no precedent; unparalleled

"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

Other Word Forms

  • unprecedentedly adverb
  • unprecedentedness noun

Etymology

Origin of unprecedented

First recorded in 1615–25; un- 1 + precedent + -ed 2

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Internet access in Iran will "gradually" return to normal this week, a senior Iranian official said Monday on the 11th day of an unprecedented shutdown.

From Barron's

The memory chip shortage is considered “unprecedented,” with demand projected to outpace supply into 2026.

From Barron's

Energy-hungry data centers that support artificial intelligence, along with expanding manufacturing, are putting unprecedented pressure on power systems worldwide.

From Science Daily

It comes a week after US Federal Reserve chair Jerome Powell said he was the subject of an "unprecedented" US justice department criminal investigation over his testimony about the bank's building renovations.

From BBC

This is perhaps understandable – these are unprecedented developments and the options open to European powers are limited.

From BBC