rare event
Once-in-a-lifetime happening
A rare event is something that happens infrequently or with low probability.
The term appears in statistics, insurance, and risk assessment, where rare events—earthquakes, market crashes, plane accidents—require special modeling because standard methods assume more frequent data.
In everyday speech, it emphasizes unusualness: Snow in Miami is a rare event.
- anomalyDeparture from the expected
- occurrenceSomething that takes place
- phenomenonExtraordinary observable occurrence
- unlikelyNot apt to happen
- long shotUnlikely to succeed
fluke · outlier · freak accident · miracle · coincidence · act of God · lightning · once-in-a-lifetime · once in a blue moon · exceptional · singular · unprecedented · freak · perfect storm · statistical · chance · improbable · one in a million
- outliersoutlier, odd one out, anomaly, odd man out, aberration
- one-time thingsonce, single-use, one-off, disposable, nonrecurring
rare eventcommonplace
Unremarkable and frequent
nothing special · par for the course · business as usual · same old thing
rare, rarer, rarest, rarely, rareness, rarity, rarefied, rarefy, rarefaction