Any one of a great variety of unctuous combustible substances, not miscible with water; as, olive oil, whale oil, rock oil, etc. They are of animal, vegetable, or mineral origin and of varied composition, and they are variously used for food, for solvents, for anointing, lubrication, illumination, etc. By extension, any substance of an oily consistency; as, oil of vitriol.
To smear or rub over with oil; to lubricate with oil; to anoint with oil.
In the 20th century, the United States endured two world wars and other traumatic and expensive military conflicts; the Depression; a dozen or so recessions and financial panics; oil shocks; a flu epidemic; and the resignation of a disgraced president. Yet the Dow rose from 66 to 11,497. Warren Buffett
There is an urgent need to stop subsidizing the fossil fuel industry, dramatically reduce wasted energy, and significantly shift our power supplies from oil, coal, and natural gas to wind, solar, geothermal, and other renewable energy sources. Bill McKibben
Formula for success: rise early, work hard, strike oil. J. Paul Getty
If you want a love message to be heard, it has got to be sent out. To keep a lamp burning, we have to keep putting oil in it. Mother Teresa
A century ago, petroleum - what we call oil - was just an obscure commodity; today it is almost as vital to human existence as water. James Buchan