something that's never happened before

unprecedented

adjective|/ʌnˈpres.ɪ.den.tɪd/

Never having happened or existed before

Examples

In a meeting

We're seeing unprecedented growth in user engagement this quarter.

Over coffee

The heat wave was unprecedented—we've never had temperatures this high.

Why this word

new

unprecedented means never before occurring in history, while new just means not existing before

unique

unprecedented emphasizes no prior example exists, while unique means one of a kind

unusual

unprecedented means no precedent exists, while unusual just means rare or uncommon

Usage tip

Use to emphasize true firsts, but avoid overusing for merely unusual events

Etymology

Latin: un- (not) + praecedere (go before) from prae- (before) + cedere (go) — 'not having gone before'

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