<p><strong>Verb (used without object)</strong></p><ul><li>to make a loud, harsh noise: The gears of the old car clashed and grated.</li><li>to come together or collide, especially noisily: The cymbals clashed.</li><li>to conflict; disagree: Their stories of the accident clashed completely.</li><li>(of juxtaposed colors) to be offensive to the eye.</li><li>to engage in a physical conflict or contest, as in a game or a battle (often followed by with): The Yankees clash with the White Sox for the final game of the season.</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>to strike with a resounding or violent collision: He clashed his fist against the heavy door.</li><li>to produce (sound) by or as by collision: The tower bell clashed its mournful note.</li></ul><p><strong>Noun</strong></p><ul><li>a loud, harsh noise, as of a collision: The automobiles collided with a terrible clash.</li><li>a collision, especially a noisy one.</li><li>a conflict; opposition, especially of views or interests: a clash between nations.</li><li>a battle, fight, or skirmish: The clash between the border patrols left three men dead.</li></ul>