<p><strong>Verb</strong></p><ul><li><p>(used with object) to fight or contend against; oppose vigorously:</p><ul><li>to combat crime.</li></ul></li><li><p>Synonyms: contest, struggle</p></li><li><p>(used without object) to battle; contend:</p><ul><li>to combat with disease.</li></ul></li><li><p>Synonyms: contest, struggle</p></li></ul><p><strong>Noun</strong></p><ul><li>Military: active, armed fighting with enemy forces.</li><li>a fight, struggle, or controversy, as between two persons, teams, or ideas.</li></ul>