<p><strong>Verb (used with object):</strong></p><ul><li>to fill to excess; overcrowd or overburden; clog: The subway entrance was so congested that no one could move.</li><li>Pathology: to cause an unnatural accumulation of blood or other fluid in (a body part or blood vessel): The cold congested her sinuses.</li><li>Obsolete: to heap together.</li></ul><p><strong>Verb (used without object):</strong></p><ul><li>to become congested: His throat congested with phlegm.</li></ul>