<p><strong>Noun</strong></p><ul><li>A division of the Roman army, usually comprising 3000 to 6000 soldiers.</li><li>A military or semimilitary unit.</li><li>The Legion.</li><li>American Legion.</li><li>Foreign legion (def 2).</li><li>Any large group of armed men.</li><li>Any great number of persons or things; multitude.</li><li>Synonyms: sea, host, mass, throng.</li></ul><p><strong>Adjective</strong></p><ul><li>Very great in number: The holy man's faithful followers were legion.</li></ul>