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(1) A meeting of the leaders or representatives of countries, territories, or organizations. A congress is also a type of international conference (for example, the Congress of Vienna of 1814–15; the World Peace Congresses; the World Congress for Peace, National Independence, and General Disarmament of 1965; and various scientific congresses).
(2) In some countries, including Bolivia, Brazil, Venezuela, Honduras, Colombia, Mexico, and the Philippines, the name of the legislative body or of one of its houses. In the United States the Congress is the highest legislative body; it consists of two houses—the House of Representatives (435 representatives; elected every two years) and the Senate (100 senators, two from each state, elected for a six-year term, with one-third of the members elected every two years). In France the congress is the joint session of both houses of parliament.
(3) The name of some national organizations in a number of countries (for example, the Indian National Congress Party in India).
a meeting of representatives (delegates) of any of various organizations or groups, or of those active in a particular field of endeavor (see, , and ). In several organizations, the congress is the highest body.