one-off

we decided on a one-off payment for the service.

this was a one-off event, unlikely to be repeated.

the company offered a one-off bonus to employees.

it was a one-off opportunity we couldn't miss.

the project was a one-off initiative by the department.

we're having a one-off fundraising gala next month.

this is a one-off collaboration with a new artist.

the band played a one-off concert at the festival.

it was a one-off purchase, not part of our usual routine.

the charity organized a one-off raffle to raise funds.

we're doing a one-off marketing campaign next quarter.