Web page is one type of document which shares information suits for WWW(world wide web) and all people can accessed through a web browser and can be displayed on your monitor and mobile device. Is is type of HTML and XHTML and you can navigate to other web pages via hypertext links. The Web pages may be requested and served from web servers using HTTP(Hyper Text Transfer Protocol).
In simple definition:
Web page is a single, usually hypertext document on the World Wide Web that can incorporate text, graphics, sounds, etc.