<p><strong>Adjective</strong></p><ul><li>Of or relating to mode, manner, or form.</li><li>Music: relating to mode, as distinguished from key; based on a scale other than major or minor.</li><li>Also single modal.</li><li>Transportation: relating to or suitable for transportation involving only one form of a carrier, such as truck, rail, or ship.</li><li>Compare bimodal, intermodal.</li><li>Grammar: being or relating to mood.</li><li>Philosophy: relating to a mode of a thing, as distinguished from one of its basic attributes or from its substance or matter.</li><li>Statistics: relating to the mode, the value that occurs most frequently in a particular data set, population, etc.</li><li>Logic: exhibiting or expressing some phase of modality.</li></ul><p><strong>Noun</strong></p><ul><li>Grammar: modal auxiliary.</li></ul>