Source : Free On-Line Dictionary of Computing

Virtual Local Area Network
     
         (VLAN) A logical grouping of two or more {nodes}
        which are not necessarily on the same physical {network
        segment} but which share the same {IP} {network number}.  This
        is often associated with {switched Ethernet}.
     
        IEEE 802.1Q is a VLAN standard.
     
        [Confirm?  Better description?  Reference?]
     
        (2002-08-30)