Once-in-a-lifetime definition
That is likely to happen only once in one's lifetime.
A once-in-a-lifetime opportunity to travel the world.
adjective
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A once-in-a-lifetime opportunity to travel the world.
A once-in-a-lifetime honeymoon experience is something that can't be bought in a store.
This is truly a once in a lifetime prize that every rock ' n ' roller would sell their soul for.
For a day you'll never forget on that special occasion, take a once-in-a-lifetime voyage to the world's waters?
It was an once-in-a-lifetime experience.
This can help make a once in a lifetime vacation even better.