one-off

American

adjective

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

noun

something occurring, done, or made only once.

one-off British

noun

Also: one-shot.
1. something that is carried out or made only once
2. ( as modifier )
  
  a one-off job

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of one-off

First recorded in 1935–40

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"I see it as a one-off move maybe to do a bit of greenwashing," he said.

From Barron's

"Expanding and strengthening a rare temperate rainforest isn't a one-off intervention, it requires steady, long-term effort."

From BBC

We also are not afraid to build density in markets versus having a one-off type of approach.

From The Wall Street Journal

But something more structural and long-term has been unfolding, something that looks far less like a one-off weapons sale and more like a long-term service contract.

From MarketWatch

Investors will be looking to see whether January’s surprisingly strong payrolls numbers were a one-off.

From The Wall Street Journal

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023