noun

1. A smear, smudge or blot

2. Something that appears hazy or indistinct

3. A moral stain or blot.

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. In a state of doubt or confusion.