A "nominating convention" is an event where a political party chooses its candidate for an upcoming election. During this gathering, party members vote and decide on who they want to represent their party. Full definition
The convention met in Columbus to select delegates to be sent to the Green Party presidential nominating convention in Baltimore this July. (thirdpartypolitics.us)
Both parties held nominating conventions at the new «town center» in the former Rosendale elementary school. (hudsonvalleyone.com)
Suffolk's Democrats and Republicans have both held nominating conventions, but neither party has decided who will run in November for the North Fork's open State Assembly seat. (suffolktimes.timesreview.com)