WAN
Wide
Area
Network of computers spanning hundreds or thousands of miles. Unlike intranets and virtual private networks, WANs do not use public
Internet arteries and are totally isolated from the public domain.  (See also
LAN ,
Intranet ,
Extranet , and
Virtual Private Networks (VPN) )
Stands for Wide Area Network. A network of computers that covers a large geographical distance.
See: Wide area network
A network, usually constructed with serial lines, which covers a large geographic area. See also: Local Area Network, Metropolitan Area Network.
WAN(Wide area Network ) Group of computers located geographically apart,usually belonging to a single company or organisation ,connected together using dedicated lines or by satellite to simulate a local network.
Stands for "Wide Area Network." A WAN is similar to a Local Area Network (LAN), but it's a lot bigger. Unlike LANs, WANs are not limited to a single location. Many wide area networks span long distances via telephone lines, fiber-optic cables, or satellite links. They can also be composed of smaller LANs that are interconnected. The Internet could be described as the biggest WAN in the world. Heck, you could even call the Internet a Super WAN BAM if you wanted to. Again, I need to get some sleep.