Definition of "Oil" :

noun: oil paint containing pigment that is used by an artist

noun: any of a group of liquid edible fats that are obtained from plants

noun: a slippery or viscous liquid or liquefiable substance not miscible with water

noun: a dark oil consisting mainly of hydrocarbons

verb: administer an oil or ointment to; often in a religious ceremony of blessing

verb: cover with oil, as if by rubbing

"Oil the wooden surface."