Some of my old coworkers at the Church are having a debate. The Church keeps using the term "meme" to refer to shareable images with inspirational quotes on them, and my former coworkers hate it, because those aren't really memes. I'm having a hard time defining exactly what a meme is, though, and an even harder time coming up for an alternative name for these non-meme images.
I think memes can be things other than text on images, but the ones that are are more than just text on images, if that makes sense. For one thing, they're usually organic—manufactured memes aren't really memes, I think. And real memes are usually sort of templatized catchphrases or cultural references that can be used in a variety of situations.
The real question, though, is whether it's worth it to try to get the Church to change its usage. Maybe this usage bugs the more internet-savvy members, but I think we're in the minority.