diff --git a/curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md b/curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
index e43be08d949..780da31a816 100644
--- a/curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
+++ b/curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
@@ -7,6 +7,8 @@ dashedName: step-7
 
 # --description--
 
+A <dfn>modal</dfn> is an element that prevents all interaction with elements outside it until the modal has been dismissed.
+
 The HTML `dialog` element has a `showModal()` method that can be used to display a modal dialog box on a web page.
 
 ```js