My definition: a company that makes most of its money via the web.
.net, by the way, isn't a domain name. It's a TLD (top level domain) like .com, .gov, .org, .eu, .info, and all countries (.uk, .de, .au).
Kees
What is regarded as a dot net Company?
.Net is a domain name for it related URL'S?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic