extranet - Computer Definition
An intranet opened to select groups of users outside of a company.Access generally is provided to groups of vendors, suppliers, customers, and others who have a requirement to access select databases and processes. Extranets, for example, can enable customers to place orders electronically and to track them to fulfillment, and vendors can track retail sales of their products, perhaps store-by-store. See also intranet.
A Web site for customers rather than the general public. It can provide access to research, current inventories and internal databases, virtually any information that is private and not published for everyone. An extranet uses the public Internet as its transmission system, but requires passwords to gain entrance. Access to the site may be free or require payment for some or all of the services offered. See EDI and virtual data room.