C1adjectiveformal10K+

Unprecedented

UK /["/ʌnˈpresɪdentɪd/"]/US /["/ʌnˈpresɪdentɪd/"]/

Definition

that has never happened, been done or been known before

In simple words: Something that has never happened before.

Examples

  • The situation is unprecedented in modern times.
  • There were unprecedented scenes of violence in the city’s main square.

Usage notes

Use 'unprecedented' in academic or formal contexts, particularly when discussing events or changes. It's less common in casual conversation.

Grammar pattern

standalone adjective

Memory hint

Think of 'un-precedented' as 'never had a precedent', meaning it’s completely new.

Collocations

  • be
  • entirely
  • quite
  • totally

Synonyms

  • extraordinary
  • unmatched
  • unparalleled
  • unheard-of
  • novel

Antonyms

  • precedented
  • usual
  • common

Common mistakes

  • 'Unprecedented' is often confused with 'unforeseen' or 'unexpected'.
  • 'Unprecedented' can be used incorrectly to describe something that is simply new, but it should refer to something never experienced before.