1. the national legislative body of a country, especially the U.S. Congress consisting of the Senate and House of Representatives
2. a formal meeting or series of meetings for discussion between delegates or representatives
3. the action of coming together
Usage: formal

Examples

• Congress passed a new healthcare bill last month.
• The president addressed both houses of Congress.
• She was elected to Congress in 2020.
• The medical congress will be held in Chicago next year.
• Delegates from fifty countries attended the international congress.
• The congress of world leaders discussed climate change.
• A congress of scientists gathered to share their research.