smoker (Noun) — A person who smokes tobacco.
smoker (Noun) — A party for men only (or one considered suitable for men only).
smoker (Noun) — A passenger car for passengers who wish to smoke.
smoker (Noun) — A device for smoking food; a person who smokes food.
smoker (Noun) — A device that releases smoke intended to calm bees, e.g. for use before a beekeeper's inspection of a hive.