"Flammable" refers to materials that can easily catch fire and burn quickly. This property is important to consider for safety in various environments, such as homes, workplaces, and transportation. Common flammable substances include gasoline, alcohol, and certain types of wood. When a flammable material is exposed to a heat source, such as a flame or spark, it can ignite and lead to a fire. Understanding flammability helps in preventing accidents and ensuring proper storage of hazardous materials, like chemicals and fuels, to minimize fire risks.