Again you show your ignorance.

Closures is taken from the math world:

"This smallest closed set is called the closure of S (with respect to these operations)"

https://en.wikipedia.org/wiki/Closure_(mathematics)

The "operation" is the function, and the closure is the smallest set of things that the function can access to.

There is nothing lexical here, and quoting the closing "}" means a bad understanding on the difference between scope and closure.