blur - definition and synonyms

verb [intransitive/transitive] 

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present tense
present participleblurring
past tenseblurred
past participleblurred
  1. 1
    if a thing blurs, or if something blurs it, it becomes difficult to see it clearly, often because its edges are not clear

    With eyesight as poor as mine, faces blur into featureless ovals.

    The paper had got wet and blurred the ink.

  2. 2
    if the difference between two things blurs, or if something blurs it, they become more similar, so that you are no longer sure that they are clearly different
    blur the line/difference/distinction between:

    Their adverts blur the line between art and advertising.

  3. 3
    if something such as a memory or an idea has blurred, or if something has blurred it, it is no longer clear in your mind