a dirty mark or smear.

a smeary state.

a stifling smoke.

a smoky fire, esp. one made for driving away mosquitoes or safeguarding fruit trees from frost.

to mark with dirty streaks or smears.

to fill with smudge, as to drive away insects or protect fruit trees from frost.

to form a smudge on something.

to become smudged

White shoes smudge easily.

to smolder or smoke; emit smoke, as a smudge pot.