Look up oil in Wiktionary, the free dictionary.
Oil is any of a number of nonpolar, hydrophobic, and viscous liquids.
Oil also often refers to:
- Cooking oil, any liquid fat used in food preparation
- Lubricant, a substance that reduces friction between surfaces
- Lubrication, using a lubricant to reduce friction
- Motor oil, any lubricant used in internal combustion engines
- Petroleum (crude oil), naturally occurring liquid found beneath the Earth's surface, or a derived product:
- Fuel oil, liquid fuel burned for heat or power
- Heating oil, liquid fuel
Oil or OIL may also refer to: