I could describe JQuery as a library that allows you to easily select elements on and traverse the DOM, the DOM would be the name of the tree or organizational structure of the HTML.

When you are describing what JS (or any other language) scope bubbles up from the local scope, to its parent scope, to its parent scope, to its parent scope, ...., until there are no more parent scopes, where you have reached the global Object scope, what would you call this scope organization?