From WordNet (r) 3.0 (2006):
oil
n 1: a slippery or viscous liquid or liquefiable substance not
miscible with water
2: oil paint containing pigment that is used by an artist [syn:
oil, oil color, oil colour]
3: a dark oil consisting mainly of hydrocarbons [syn:
petroleum, crude oil, crude, rock oil, fossil oil,
oil]
4: any of a group of liquid edible fats that are obtained from
plants [syn: vegetable oil, oil]
v 1: cover with oil, as if by rubbing; "oil the wooden surface"
2: administer an oil or ointment to ; often in a religious
ceremony of blessing [syn: anoint, inunct, oil,
anele, embrocate]