To make dirty, especially in one small area.
To smear or blur (something).
To fill (an orchard or another planted area) with dense smoke from a smudge pot in order to prevent damage from insects or frost.
To smear something as with dirt, soot, or ink.
To become smudged: Photo negatives smudge easily.
A blotch or smear.
A smoky fire used as a protection against insects or frost.