<p><strong>Noun</strong></p><ul><li>a point that marks the beginning of a change: Our nation is on the cusp of a new era.</li><li>a point or pointed end: The sharp cusp of the mountain pierced through the thick clouds.</li><li>a point, projection, or elevation, as on the crown of a tooth.</li><li>a point where two branches of a curve meet, end, and are tangent.</li><li>a decorative device consisting of a pair of curves that are tangent to a real or imaginary line defining the area being decorated, and meet at a point within that area.</li><li>a point of a crescent, especially of the moon.</li><li>the zodiacal degree that marks the separation between consecutive houses or signs: Those born on the Cancer/Leo cusp have the vitality and ambition to be successful in their creative endeavors.</li><li>a person born during a time when the sun is at the very end of one sign or at the very beginning of another: Virgos and Virgo cusps tend to be shy and somewhat nervous, and they may be undemonstrative.</li></ul><p><strong>Verb</strong></p><ul><li>to cuckold.</li><li>to butt or gore with the horns.</li></ul><p><strong>Adjective</strong></p><ul><li>made of horn.</li></ul>