Webster's English Dictionary

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blur

1. blur \'bl*r\ \-e-\ n [perh. akin to ME bleren to blear] 1: a smear or 
   stain that obscures but does not efface  2: something seen or perceived as 
   vague or lacking definite outline  - blur.ry aj
2. blur vb or blurred;  or blur.ring 1: to obscure or blemish by smearing  
   2: SULLY  3: to make dim, indistinct, or vague in outline or character  4: 
   to make cloudy or confused  1: to make blurs  2: to become vague, 
   indistinct, or indefinite