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under no circumstances

This page is about the idiom under no circumstances


If you are told that under no circumstances should you do something, you must never do it, no matter what happens.

For example

  • If the red light is on outside the studio, under no circumstances is anyone to go in there. It means they're recording a song.

  • This is a dangerous drug, so under no circumstances is it to be left anywhere in the hospital that members of the public could access.

Quick Quiz

Under no circumstances can this door be left open. You

a. mustn't leave it open

b. ought to leave it open

c. should never open it

Idiom of the Day

Contributor: Matt Errey