Your definition seems to have its roots tightly coupled to abstraction vs primitive in the sense of Object-oriented programming. Your use of the word "instantiation" makes me feel that way. Let me know if that is misguided.

In the world of concurrency you could probably even call goroutines an abstraction but goroutines are at least closer to the fundamental concurrency primitives such as threads, locks, mutexes and tasks/coroutines/whatever.