What is the difference between a website and a web application?
A website might just be static content - a web application would have dynamic content. It is a very fuzzy line.
Here is the microsoft answer: http://msdn.microsoft.com/en-us/library/aa730880(VS.80).aspx#wapp_topic5
A web-application is an application that is hosted on the internet. It can have a front-end or user-interface on a web-site.
Hope that helps.
Semantics.... generally a website contains static HTML pages and a web application performs some type of work. For example, a website for a realtor may give information about the realtor, where a web application for the realtor may list current properties and manage the contact information for the realtor themselves.
You can charge the customer more if you claim it's a web application :)
Seriously, the line is fine. Historically, web apps were the ones with code and/or scripts (in Perl/CGI, PHP, ASP, etc.) on the server, and sites were the ones with static pages. Currently, everyone and their uncle's cat are running forums, guestbooks, CMS - that's all server code.
Another distinction is along the subject matter lines. If it's a line-of-business solution, then it's an app. If it's consumer oriented - they call it a site. Although technology-wise, it's more or less the same.
A web application is a software program which a user accesses over an internal network, or via the internet through a web browser. An example of one of the most widely used web applications is Google Docs, which facilitates most of the capabilities of Microsoft Word; it’s free and easy to use from any location.
A web site, on the other hand, is a collection of documents that are accessed via the internet through a web browser. Web sites can also contain web applications, which allow visitors to complete online tasks such as: Search, View, Buy, Checkout, and Pay.
We know what is a "site" and "application", so all we got left is The Web
Now, a web application may be a part of a whole website. A website is comprehended of web applications. Though usually you'll see that a website has only one web application.
For instance, you have an iPhone device (compared to a website) which may include different applications: playing music, videos, web browser etc.