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Cathy's only been to visit us once.
I'd seen the show once before, but I enjoyed seeing it again.
I'm only going to say this once, so listen carefully.
We met just the once, but I still remember him very clearly.
Did you know that Dan was once a policeman?
Louise bought the house where her grandparents had once lived.
The once mighty US car industry was now facing strong competition from abroad.
You can pay the bill for once.
It would be nice if, just for once, the two of you could get on with each other.
This is the British English definition of once. View American English definition of once.
an extra sail sometimes fitted on the front of a boat used for racing