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on the off chance

on the off chance

13 6.7
Just in case there is a small chance something will happen
  • idiom
translation icon : por si acaso
  • I applied for the job on the off chance that I might get an interview.
  • just on the off chance
  • on the off chance that we actually
  • on the off chance I ever

Maybe that's worth doing a little work towards it on the off chance it might be true.

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Examples

  • Still, when I'm in a new place, I do tend to leaf through the Yellow Pages in an idle moment, on the off chance that I might find listings like Metaphysicians or Cat Walkers or Husbands.

    Fiction book (1995)
  • "I went straight to Internal Affairs and told them to check it out on the off chance that some of my officers are involved."

    Fiction book (2000)
  • It's a long time to wait just on the off chance.

  • I arrived then, on the off chance it might be on time.

    Fiction book (1992)
  • But on the off chance that they are much worse, there could be an impact.

    Blog text (34)
  • So I would propose we all start working together on the off chance that some good can still come out of this nightmare.

  • You read about men; they get so obsessed with a woman that they go to restaurants on the off chance she'll be there.

    Fiction book (1995)
  • Hours earlier, they'd run out of things to say, yet neither wanted to leave the room on the off chance a rescue boat would appear.

    Fiction book (2002)
  • On the off chance that he comes back alive, then I will turn up the hem for his party.

    Fiction book (1996)
  • Maybe that's worth doing a little work towards it on the off chance it might be true.

Synonyms

slim chance
vson the off chance
10 3.4

A very small possibility that something will happen

is used when one does something because of that slight possibility
outside chance
vson the off chance
  • Informal
6 3.5

A very small possibility that something will happen

is used when someone acts because of that small unlikely possibility

Antonyms

certainty
  • Literature
202 3.4

A strong feeling that something is true or will happen

42 4.1

Says or does something in a clear and final way that leaves no doubt

How Likely

certain
946 1.0
probable
200 3.4
possible
1.0
on the off chance
13 6.7
unlikely
487 1.9
impossible
1.4

Surface Forms

Morphology

on + the + off + chance

The noun 'chance' (possibility) and the preposition 'on' (indicating occasion) are transparent, so a learner could plausibly infer the phrase relates to doing something because of a possibility. However, the use of 'off' to signal a slight or remote probability is a collocational/idiomatic choice and the fixed sequence 'on the off chance' and its nuance (slight/unlikely possibility) are not fully predictable from the parts alone, so partial inference but not full transparency applies.

Etymology

On the off chance comes from a simple image: an off chance is a small possibility sitting to one side, so you do something 'just in case' that tiny chance happens.