Definition of "one-off" in English

Adjective

1. Occurring once, independent of any pattern; one-time.

   • The government insisted that the embarrassing loss of the tax records was a one-off event.
   • Seeing Halley's Comet is a one-off, once-in-a-lifetime opportunity.

2. Special; remarkable; rare; unusual.

Noun

1. Something that is done, created, etc. only once, and often quickly, simply, or improvisationally.

   • I'll put together a quick one-off as a sample so we can taste the recipe.

2. Something unique and remarkable.

   • It is a one-off; there is nothing else like it.