national convention

noun

1. French History. the legislature of France 1792–95.
2. U.S. Politics. a convention held every four years by each of the major political parties to nominate a presidential candidate.

noun

1. a convention held every four years by each major US political party to choose its presidential candidate
2. French history the longest-lasting of the revolutionary assemblies, lasting from Sept 1792 to Oct 1795, when it was replaced by the Directory