rule out

/ˌrul ˈaʊt/

Reviewed on

Type

Phrasal verb

Meaning

  1. To eliminate someone or something from consideration as a possibility.

    • Investigators quickly ruled out equipment failure as the cause of the crash.

    • Can we completely rule that option out before making a final decision?

  2. To make an event, action, or outcome impossible.

    • A severe knee injury ruled out her participation in the upcoming marathon.

    • Heavy snowstorms might rule out any travel across the mountain passes tonight.

How it's used

Both orders mean the same thing.

  • rule out the possibility
  • rule the possibility out

it and them go in the middle: “rule it out.” Not “rule out it.”

The doctor wanted to rule out an infection before prescribing medication.

Collocations

  • rule out the possibility
  • rule out foul play
  • rule out a suspect
  • rule out a hypothesis

Synonyms