1. resistant to or impervious to grease or oil; not allowing grease to pass through
Usage: commonly used in British English; North American equivalent is often 'grease-resistant'

Examples

• Greaseproof paper is ideal for wrapping sandwiches and baked goods.
• The bakery uses greaseproof bags to package their pastries.
• Line the baking tray with greaseproof paper before adding the cookies.
• Greaseproof packaging helps keep food fresh and prevents staining.
• She wrapped the fried chicken in greaseproof paper for transport.