once in a lifetime
Never happening again
Once in a lifetime describes something so rare or extraordinary that a person might experience it only once: a once-in-a-lifetime opportunity, a once-in-a-lifetime trip.
The phrase emphasizes uniqueness and urgency—if you miss it, you may never get another chance.
Often hyphenated when used as an adjective before a noun.
- bucket listPre-death wish inventory
- unrepeatableImpossible to do again
- unforgettablePermanently fixed in memory
- dream come trueDesired outcome finally happening
- legendaryFamous beyond ordinary measure
exceptional · one-off · one shot · irreplaceable · rare · now or never · iconic · revelatory · singular · pivotal · watershed moment · milestone · emblematic · unprecedented · defining · monumental · peak experience · cherished
- opportunitygolden opportunity, window of opportunity, opportunity knocks, golden chance, big break
- Hyperbolea zillion, bazillion, gazillion, bajillion, zillion
- rarityrare, scarce, uncommon, infrequent, scant
- Extreme Adjectivesastronomical, boundless, colossal, countless, endless
- surprisessurprise party, unexpected gift, plot twist, unexpected event, unexpected success
- rare phenomenaanomaly, rarity, oddity, phenomenon, aberration