<p><strong>Noun</strong></p><ul><li>Any of a large class of substances typically unctuous, viscous, combustible, liquid at ordinary temperatures, and soluble in ether or alcohol but not in water: used for anointing, perfuming, lubricating, illuminating, heating, etc.</li><li>A substance of this or similar consistency.</li><li>Refined or crude petroleum.</li><li>Painting: oil color.</li><li>Oil painting.</li><li>Informal: unctuous hypocrisy; flattery.</li><li>An oilskin garment.</li><li>Australian and New Zealand slang: facts or news; information: good oil.</li></ul><p><strong>Verb</strong></p><ul><li>To smear, lubricate, or supply with oil.</li><li>To bribe.</li><li>To make unctuous or smooth: to oil his words.</li><li>To convert into oil by melting, as butter.</li></ul><p><strong>Adjective</strong></p><ul><li>Pertaining to or resembling oil.</li><li>Using oil, especially as a fuel: an oil furnace.</li><li>Concerned with the production or use of oil: an offshore oil rig.</li><li>Made with oil.</li><li>Obtained from oil.</li></ul>