<p><strong>Adjective</strong></p><ul><li>Of or relating to the sun: solar phenomena.</li><li>Determined by the sun: solar hour.</li><li>Proceeding from the sun, as light or heat.</li><li>Utilizing, operated by, or depending on solar energy: a solar building; a solar stove.</li><li>Indicating time by means of or with reference to the sun: a solar chronometer.</li><li>Manufacturing or providing solar power: the solar industry.</li><li>Astrology: subject to the influence of the sun.</li></ul><p><strong>Noun</strong></p><ul><li>Informal: solar energy.</li></ul>