one-off

American  

adjective

1. done, occurring, or made only once; one-shot.

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noun

1. something occurring, done, or made only once.

one-off British  

noun

1. Also: one-shot. 

   1. something that is carried out or made only once

   2. ( as modifier )

      a one-off job

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Etymology

Origin of one-off

First recorded in 1935–40

Example Sentences

But according to the Treasury, it will remain in place, only temporarily lifted to allow this one-off reduction, with the new amount of the grant becoming the floor level for future calculations.

From BBC • Jun. 26, 2026

STOCKHOLM—Hennes & Mauritz’s second-quarter earnings were dented by one-off costs as it continues work to grow revenue through a series of product and customer experience strategies.

From The Wall Street Journal • Jun. 25, 2026

And Micron insists it’s not a one-off, with the memory-chip shortage set to last at least another 18 months.

From Barron's • Jun. 25, 2026

This weekend, he was a special guest at The Gorillaz' kaleidoscopic, one-off stadium concert.

From BBC • Jun. 22, 2026

Less like he was a mistake, a one-off that no one could explain.

From "Boy 2.0" by Tracey Baptiste