Congress (noun)

1. A meeting or series of meetings of representatives, especially of a political party or a trade union, for discussion and the transaction of business.
2. A national legislative body, especially in the US.
3. A group of people with a common goal who come together to discuss and make decisions.

Origin:

Late 16th century (denoting a journey or meeting): from latin congressus, from con- 'together' + gredi 'go'.

Examples:

1. The annual congress of the trade union is taking place next week.
2. The US Congress consists of the Senate and the House of Representatives.
3. A congress of scientists was held to discuss the latest developments in their field.
4. The congress adopted a resolution calling for a ban on landmines.
5. A congress of bishops from around the world was called to address the issue of poverty.