The article defines it through an example:
reply> You've been wanting to take cooking classes, but you've also been wanting to join an improv group. If you don't have time/resources for both of these projects, you might choose a metaproject like "weekly dinner party with funny friends" -- it doesn't strictly meet the requirements from either project, but it might fulfill some deeper desire.
So the idea is to extrapolate a new project that satisfies some core aspects of multiple projects you dont have time for.
That example was not there when he wrote the comment :) I snuck it in after all the helpful feedback in this comment section haha
replyWhat you're describing reminds me very strongly of Here Dragons Abound's "Forever Project":
replyhttps://heredragonsabound.blogspot.com/2020/02/the-forever-p...
Makes sense. I've been discovering that components of ideas I've had would make neat reusable libraries on their own.
reply> For example, my overarching project is to develop my own computer system, from the custom CPU, up to the operating system and applications, as completely from scratch as possible. This has led me to learn more about Verilog, electronics, soldering, computer architecture, RISC-V, emulators, you name it.
replyHow long do you estimate is going to take you to complete?