[requireJS] define VS require

Difference between define and require

We often see define and require in requireJS, but what's their difference? I try to elaborate as below.

require

1. When you want to load some stuff, you need to use require, like jquery, bootstrap etc.
2. It has NO return statement

e.g.:

require(["jquery", "bootstrap", "bootstrap_select"], function() {
 //requirejs sugar function
 var angular = require('angular');
});

define

1. As the name implies, it helps you define module that will be depend by other modules or applications
2. It has return statement for inclusion by other modules

e.g.:

define(["angular", "angular-route", "angular-animate"],function(angular){
 var insiderApp = angular.module("insiderApp",["ngRoute", "ngAnimate"]);
 //routing
 insiderApp.config(['$routeProvider','$locationProvider',function($scope,$routeProvider,$locationProvider){
  
 }]);
 
 return insiderApp;
});

This is official explanation
 /**
     * The function that handles definitions of modules. Differs from
     * require() in that a string for the module should be the first argument,
     * and the function to execute after dependencies are loaded should
     * return a value to define the module corresponding to the first argument's
     * name.
     */