<p><strong>Adjective</strong></p><ul><li>not intoxicated or drunk.</li><li>habitually temperate, especially in the use of liquor.</li><li>quiet or sedate in demeanor, as persons.</li><li>marked by seriousness, gravity, solemnity, etc., as of demeanor, speech, etc.: a sober occasion.</li><li>subdued in tone, as color; not colorful or showy, as clothes.</li><li>free from excess, extravagance, or exaggeration: sober facts.</li><li>showing self-control: sober restraint.</li><li>sane or rational: a sober solution to the problem.</li></ul><p><strong>Verb</strong></p><ul><li>to make or become sober: (often followed by up).</li></ul>