smudge

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To make dirty, especially in one small area.
• intransitive verb To smear or blur (something).
• intransitive verb To fill (an orchard or an inhabited area) with dense smoke from a smudge pot in order to prevent damage from frost or to repel insects.
• intransitive verb To smear something, such as dirt or soot.
• intransitive verb To become smudged or blurred.
• noun A blotch or smear.
• noun A blurry or indistinct part or image.
• noun A smoky fire used to protect against frost or to repel insects.

from The Century Dictionary.

• noun A suffocating smoke.
• noun A heap of combustibles partially ignited and emitting a dense smoke; especially, such a fire made in or near a house, tent, or the like, so as to raise a dense smoke to repel insects.
• To smear or stain with dirt or filth; blacken with smoke.
• To smoke or cure, as herring.
• noun A spot; stain; smear.
• noun The scrapings and cleanings of paint-pots, collected and used to cover the outer sides of roof-boards as a bed for roofing-canvas.
• To stifle; smother.
• To make a smudge in; fumigate with a smudge: as, to smudge a tent so as to drive away insects.
• noun In the game of set-back all-fours, the player who bids 4 and makes it, winning the came on the hand if he is not in the hole on the score at the time.

from the GNU version of the Collaborative International Dictionary of English.

• noun A suffocating smoke.
• noun United States A heap of damp combustibles partially ignited and burning slowly, placed on the windward side of a house, tent, or the like, in order, by the thick smoke, to keep off mosquitoes or other insects.
• noun That which is smeared upon anything; a stain; a blot; a smutch; a smear.
• transitive verb To stifle or smother with smoke; to smoke by means of a smudge.
• transitive verb To smear; to smutch; to soil; to blacken with smoke.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A blemish; a smear.
• noun Dense smoke, such as that used for fumigation.
• verb To obscure by blurring; to smear.
• verb To soil or smear with dirt.
• verb To use dense smoke to protect from insects.
• verb To stifle or smother with smoke.
• verb paganism To burn herbs as a cleansing ritual.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb make a smudge on; soil by smudging
• noun a blemish made by dirt
• noun a smoky fire to drive away insects