Even an AP Government student knows the answer to this one!
Instead of trying to go over a complicated definition, let's start out with a real life example: Elections!
Let's say there is a race for, say, Clerk of the Court. The Clerk of the Court is an elected position, not an appointed one, so that means the voters get to pick who they want. Well, election procedure dictates that only 1 (one) person may represent a party on the ballot. In other words, there can only be 1 (one) Republican or 1 (one) Democrat. (I am fairly sure that a race can have as many Independents as needed for the candidates.)
So what if the election people run into the problem of having more than one person of a particular party seeking the same position? There is a solution to this. A CONVENTION. A convention decides which person gets to represent the party. People of ONLY that elected party get to choose. This makes absolutely PERFECT sense because why would a Democrat be asked to choose who the Republican opponent is going to be for their candidate????
Which brings us back to Lucy Beauchamp. As soon as she heard that members of only one party were going to vote in the convention (as outlined above), she balked. She said something along the lines of "it's not fair that not all voters can vote." HO-LEE CRAP. I can't believe I'm even HEARING THIS!!! So dearest Lucy scratched out the word "Republican" and wrote the word "Independent" next to her name. That means that the convention is now unnecessary, the catering has to be cancelled, and the tables and chairs have to be returned to storage. In the meantime, AP Government students all over Prince William County are rolling out of their desks, laughing their asses off because............
BEAUCHAMP, A PERSON OF POLITICS, DOES NOT REMEMBER HOW A CONVENTION WORKS
CONGRATULATIONS LUCY!!! You've just become the laughing stock of the Republican Party of PWC.