Any of numerous mineral, vegetable, and synthetic substances and animal and vegetable fats that are generally slippery, combustible, viscous, liquid or liquefiable at room temperatures, soluble in various organic solvents such as ether but not in water, and used in a great variety of products, especially lubricants and fuels.
Petroleum.
A petroleum derivative, such as a machine oil or lubricant.
A substance with an oily consistency.
Oil paint.
A painting done in oil paint.
Insincere flattery.
tr.v.
oiled, oil·ing, oils To lubricate, supply, cover, or polish with oil.
[Middle English, from Old French oile, from Latin oleum, olive oil, from Greek *elaiwon, elaion, from *elaiwā, elaiā, olive.]
(oil) 