what does $ mean here in JQuery

Question

In the following

var obj = { one:1, two:2, three:3, four:4, five:5 };
    $.each(obj, function(i, val) {
       console.log(val);
    });

what

Answer 1

http://api.jquery.com/jQuery/

jQuery() — which can also be written as $() — searches through the DOM for any elements that match the provided selector and creates a new jQuery object that references these elements..

-jQuery Site