Meaning of “blur” in the English Dictionary

"blur" in British English

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(Definition of “blur” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"blur" in American English

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blurnoun [ U ]

us /blɜr/

something whose shape is not clear

A blur is also something that you cannot remember clearly:

It all happened so long ago that it’s just a blur to me now.
adjective us /ˈblɜr·i, ˈblʌr·i/

The exhibit consisted of blurry, blown-up, black-and-white photographs.

-rr- to become unclear, or to make something hard to see:

[ T ] These deals are blurring the distinction between local and long-distance telephone service.

-rr- If a memory has blurred or something has blurred it, it becomes hard to remember clearly:

My childhood memories are already blurring.
adjective us /blɜrd/

People who develop meningitis can get a stiff neck, blurred vision, and headaches.

(Definition of “blur” from the Cambridge Academic Content Dictionary © Cambridge University Press)