<p><strong>noun</strong></p><ul><li>An issue, plan, etc., that does not get or deserve to get under way.</li><li>A general breakup or dispersion; sudden downfall or rout: The revolution ended in a debacle.</li><li>A complete collapse or failure.</li><li>A breaking up of ice in a river.</li><li>A violent rush of waters or ice.</li></ul>