<p><strong>Noun</strong></p><ul><li>Classical Mythology: any of the sons of Uranus and Gaia, including Coeus, Crius, Cronus, Hyperion, Iapetus, and Oceanus.</li><li>Also Titaness: any of the sisters of these, including Mnemosyne, Phoebe, Rhea, Tethys, Themis, and Thia.</li><li>any of the offspring of the children of Uranus and Gaia.</li><li>the Titan, Helios.</li><li>Astronomy: one of the moons of Saturn.</li><li>(usually lowercase) a person or thing of enormous size, strength, power, influence, etc.: a titan of industry.</li><li>Military: a two-stage, liquid-fueled U.S. intercontinental ballistic missile in service since the late 1950s and designed for launch from underground silos.</li></ul><p><strong>Adjective</strong></p><ul><li>(lowercase) titanic.</li></ul>