They are one and the same person.

He is on his uppers and struggling to make ends meet.

Finding a true soulmate is like finding a needle in a haystack, they say. It's like finding one in a million.

This store is a one-stop shop for all your shopping needs.

I found a great one-stop for all my music needs.

I bought a beautiful one-piece dress.

She wore a stylish one-piece to the beach.

She measured the length of the room using one foots.

They are not interested in one-offs, they prefer long-term commitments.

The one-percenters gathered at the exclusive yacht club for their annual meeting.