blurblɜr(v.; n.)blurred, blur•ring

1. (v.t.)to obscure or make indistinct, as by smearing or staining:

   The fog blurred the outline of the car.

2. to obscure or sully by smearing or applying a smeary substance.

3. to dull the perception or susceptibility of:

   vision blurred by tears.

4. (v.i.)to become indistinct.

5. to make blurs.

6. (n.)a smudge or smear that obscures:

   a blur of smoke.

7. a blurred condition; indistinctness.

8. something seen or remembered indistinctly.

Origin of blur:

1540–50; akin to blear

blur′red•ness(n.)