What's the difference between the primaries and the caucuses?

Question

Okay, here's the deal.
I thought both primaries and caucuses were to select the 'delegates', who determine the candidates for each party.
I thought primaries and the caucuses were 2 different ways of selecting the delegates within a party. Is this right?
because I read this thing somewhere else, and they said that the caucuses are for the party to 'nominate' candidates and the primaries are to get the delegates....

I'm so confused right now.

basically, I would appreciate it if somebody thoroughly explained the difference between the primaries and the caucuses

THANKS!!!

Answer 1

A caucus is a rally or meeting to hear the candidates speak and a primary is the first vote of the People to select who will appear on the general ballot where the candidates prevail.

Answer 2

Caucus in only a rally or meeting of a political party while a primary is the election of the representative of the party.