But it is. Dawkins' meme was an idea that spreads person to person. So are the modern internet-spread image macro memes. The catching on and spreading is what makes it a meme and not just an image.
The confusion is that the latter meaning of "meme" has started drifting from "an image macro that spreads" to "an image macro".
The confusion is that the latter meaning of "meme" has started drifting from "an image macro that spreads" to "an image macro".