<p><strong>Verb</strong></p><ul><li>To cool (a liquid) below its freezing point without producing solidification or crystallization; undercool.</li><li>To become supercooled.</li></ul><p><strong>Adjective</strong></p><ul><li>Very cool in temperature, especially of the maximum coolness possible: used as a setting on air conditioners.</li><li>Very cool; very sophisticated, up-to-date, unemotional, etc.</li></ul>