Good definition! I’ll often say it is a “primary unit of cultural exchange.” I consider a lot of things memes: internet memes of course, songs, scenes from movies, plot tropes, characters, basically any bit of culture that can be encapsulated and identified as a distinct entity.
I’d wait to see if fans are still trying to port Starfield to new engines in 20 years before I start talking about my company’s “best” work.