Introduction to Latin/Apposition
An appositive is a noun explaining or defining another noun. In Latin, an appositive will have the same case, usually the same number, and usually the same gender as the noun it explains or defines.
A few examples:
Cicero consul saepe declamabat. - Cicero, the consul, often made speeches. (consul is in apposition with Cicero)
Amo Lesbiam, puellam meam. I love Lesbia, my girl. (puellam meam is in apposition with Lesbiam)
The following link links to a short piece written by a Latin professor from Middlebury College. It is written for the beginning student and addresses how one should approach learning Latin as a foreign language. It is an interesting read, and I hope that you consider the validity in learning how to 'think like a Roman.'