verb

1. To make indistinct or hazy, to obscure or dim.

   “to blur a photograph by moving the camera while taking it”

2. To smear, stain or smudge.

   “to blur a manuscript by handling it while damp”

3. To become indistinct.

Synonyms: pixelate, smooth, unfocus

adjective

1. Out of focus; partially obscured; smudged.