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

Kayleigh said she had since discovered the item was not a one off, claiming there was "a whole array of products that are designed in this way" on the girls section on Shein's UK website.

From BBC • Apr. 30, 2026

Excluding certain one off items, Sherwin logged adjusted earnings of $2.35 a share, topping the average analyst target of $2.27 a share, as per FactSet.

From The Wall Street Journal • Apr. 28, 2026

Jayla never thought she’d buy a house pretty much sight unseen, much less one off the coast of Italy.

From Slate • Feb. 1, 2026

"That's more likely… if the strike is symbolic or a one off."

From BBC • Jan. 13, 2026

He polished one off in two bites, and then sat up a little further, glad that the dizzy spell was already ebbing.

From "Night Owls" by A.R. Vishny