Computers. operating independently of, or disconnected from, an associated computer.
Radio. (of a network) not supplying affiliated stations with programming but allowing each station to program its own shows, usually within a specific format.
Television. of or relating to the preliminary planning and editing of a videotaped program.
located in or serving a place not on a regular route of a railroad, bus, or air carrier: an offline ticket office.
in or to a more private place: We should take this discussion offline.
Also, off-line, off line.