What Does Asynchronous JavaScript and XML (AJAX) Mean?
AJAX is client-sided web development technique that is used to produce interactive Web applications. AJAX is a way of developing an application that combines the functions below, using JavaScript to tie it all together.
Techopedia Explains Asynchronous JavaScript and XML (AJAX)
AJAX is a combination of technologies, not a singular technology. HTML and CSS mark up and style the information and then a cross-platform and object-interaction language is accessed, typically by using JavaScript. JavaScript in turn dynamically displays the information, which allows the user to interact with it. This process exchanges data asynchronously between the browser and the server.