Definition of Oil

Noun: oil oyl

A slippery or viscous liquid or liquefiable substance not miscible with water
Oil paint containing pigment that is used by an artist
- oil color [US], oil colour [Brit, Cdn]
A dark oil consisting mainly of hydrocarbons
- petroleum, crude oil, crude, rock oil, fossil oil, black gold
Any of a group of liquid edible fats that are obtained from plants
- vegetable oil

Verb: oil oyl

Cover with oil, as if by rubbing
"oil the wooden surface"
Administer an oil or ointment to ; often in a religious ceremony of blessing
- anoint, inunct, anele [archaic], embrocate
Lubricate with oil
"oil the squeaky door"