oil ‧ skin /ˈɔɪl-skɪn/ BrE AmE noun
1 . [uncountable] special cloth that has had oil put on it so that it has a smooth surface and water cannot go through it
oilskin coat/jacket/trousers etc
2 . oilskins [plural] a coat and trousers made of oilskin and worn together
3 . [countable] a coat made of oilskin ⇨ ↑ oilcloth