Okay, so what is a chorus?

The way we look at it, it's actually a "refrain", or a section of a song that repeats--usually the same lyrics--and contains the gist of the song. The word chorus is more specifically "a refrain in which others, such as audience members, join a soloist in a song" (Wikipedia), but hey, meanings change.

For me, sometimes a few words repeated at the end of each verse function in the same way as a chorus, like Dylan's "It's All Over Now, Baby Blue".

When people say that folks like to sing along to the chorus...well, that's the real deal. "Bye bye Miss American Pie..."

Sorry, just random thoughts.

http://www.soundclick.com/MarkKaufman