What does "smear out" mean in the following sentence? I didn't find it in any dictionary.

However, small though the length is, it is nevertheless finite, and this finite extent is the bridge between quantum theory and general relativity in that it smears out the quantum fluctuations

  • Hello, amjahan. Please include the definitions from those dictionaries you did find it in. // I'd assume it is non-standard for 'smooth out'. Commented Feb 7, 2018 at 10:58

1 Answer 1


It means that this is the length-scale at which quantum fluctuations are no longer relevant. What you would "see" above this length-scale is the net effect of many smaller quantum effects combined, so you see them "smeared" together.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.