Uncaught TypeError: $(...).meanmenu is not a function

any field of my web page is not responding and in console log following error is shown "Uncaught TypeError: $(...).meanmenu is not a function at main.js:20 at main.js:130"

here is the code of main.js:20

$('.main-menu nav').meanmenu({ meanScreenWidth: "767", meanMenuContainer: '.mobile-menu' });

via Chebli Mohamed