noun
Definition: A thick, oily liquid that comes from burning wood or coal, often used to protect wood from decay and as a disinfectant. It can be harmful if inhaled in large amounts.
Example: The old fence was treated with creosote to prevent it from rotting.
verb
Definition: To apply a type of oil or chemical to protect wood from decay and insects.
Example: The workers will creosote the wooden posts to ensure they last longer.