<p><strong>adjective</strong></p><ul><li>crud·er</li><li>crud·est</li><li>in a raw or unprepared state;</li><li>unrefined or natural: crude sugar.</li><li>lacking in intellectual subtlety, perceptivity, etc.;</li><li>rudimentary;</li><li>undeveloped.</li><li>lacking finish, polish, or completeness: a crude summary.</li><li>lacking culture, refinement, tact, etc.: crude behavior.</li><li>undisguised; blunt: a crude answer.</li><li>Obsolete: unripe; not mature.</li></ul><p><strong>Synonyms</strong></p><ul><li>coarse,</li><li>unfinished.</li></ul><p><strong>Antonyms</strong></p><ul><li>refined.</li></ul><p><strong>noun</strong></p><ul><li>crude oil.</li></ul>