<p><strong>Adjective</strong></p><ul><li>Smeared or covered with oil; greasy: an oily road surface.</li><li>Of the nature of, consisting of, or resembling oil.</li><li>Of or relating to oil.</li><li>Full of or containing oil.</li><li>Smooth or unctuous, as in manner or speech: an oily hypocrite.</li></ul><p><strong>Synonyms</strong></p><ul><li>Smarmy</li></ul><p><strong>Adverb</strong></p><ul><li>In an oily manner.</li></ul>