Definition of oil paper in English:

oil paper

noun

  • [mass noun] Paper made transparent or waterproof by soaking in oil.

    • ‘The oil extracted from the seeds was used as a key ingredient for varnish and it remains a must for Hakka people who produce hand-made umbrellas with oil paper.’
    • ‘He reached for his paints, took out a fresh sheet of oil paper, and started.’