Definition from Wiktionary, the free dictionary
oilskin (plural oilskins)
- Cloth made from cotton and treated with oil and pigment to make it waterproof.
- A raincoat made from cotton fabric treated with oil and pigment to make it waterproof.
- (by extension) Foul-weather gear worn by sailors, whether of natural or synthetic materials.
cloth made from cotton treated to make it waterproof
raincoat made from treated cotton fabric
foul-weather gear worn by sailors