Oilskin/ˈɔɪlskɪn/ Definition 1 of 2Pro Tip 1/3Weather Protection Used to describe items that help shield from rain and wind, often used in outdoor contexts. She pulled on her oilskin before joining the hiking group. Pro Tip 2/3Not Breathable Oilskin fabric does not let air through easily, which can make it quite hot to wear. Despite the storm, he was sweating under his oilskin. Pro Tip 3/3Rugged Texture Oilskin items have a thick, waxy feel, distinct from smooth or soft fabrics. The oilskin's rough surface kept the raindrops rolling off.