Flammability refers to the ability of a material to catch fire and burn when exposed to a heat source. Materials that are highly flammable ignite easily and can burn quickly, while those that are less flammable require more heat or specific conditions to catch fire. Common examples of flammable materials include gasoline, paper, and wood. Understanding flammability is important for safety in various settings, such as homes, workplaces, and laboratories. Proper storage and handling of flammable substances, like chemicals and fuels, can help prevent fires and protect people and property from potential harm.