What is the meaning of oil?

noun

• A slippery or viscous liquid or liquefiable substance not miscible with water.
• Oil paint containing pigment that is used by an artist.
  • synonyms: oil color, oil colour
• A dark oil consisting mainly of hydrocarbons.
  • synonyms: petroleum, crude oil, crude, rock oil, fossil oil
• Any of a group of liquid edible fats that are obtained from plants.
  • synonyms: vegetable oil

verb

• Cover with oil, as if by rubbing.
  • usage: "oil the wooden surface"
• Administer an oil or ointment to; often in a religious ceremony of blessing.
  • synonyms: anoint, inunct, anele, embrocate