unprecedented
/ʌnˈpɹɛsɪdɛntɪd/
Proposed by a contributor, not yet supported by evidence.
Meaning · English
Never before seen, done, or experienced; without precedent.
Adjective
Examples
With the descent of the cold war, relations between the two countries (for this is, to all intents and purposes, what they became after the end of the war) were almost completely broken off, with whole families split for the ensuing decades, some for ever. This event and its after-effects, along wit
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “unprecedented” mean?
Never before seen, done, or experienced; without precedent.
Is “unprecedented” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.