Full stack development refers to the development of an entire application, involving the front end and the back end. The front end consists of the user interface, while the back end is responsible for the application's business logic and workflows. 

Full Stack development consists of front end and back-end development of the application. The front end is responsible for the appearance and the visuals of the website. The back end is responsible for all the technical aspects and working of the website. 

The term "full stack developer" refers to someone who is skilled in both the front and back ends of a website. The front end is responsible for the website's visual appearance, while the back end is responsible for the website's logic and infrastructure.