<p><strong>Noun</strong></p><ul><li>A silver-white metallic element, light in weight, ductile, malleable, and not readily corroded or tarnished, occurring combined in nature in igneous rock, shale, clay, and most soil: used in alloys and for lightweight utensils, castings, airplane parts, etc.: alum.</li><li>Aluminum, Al, 26.98, 13, 2.70 at 20°C.</li></ul><p><strong>Adjective</strong></p><ul><li>Of, relating to, or containing aluminum: an aluminum frying pan.</li></ul>