operating under the direct control
of, or connected to, a main computer.
connected by computer to one or more other computers or networks, as through a commercial electronic information service or the Internet.
of or denoting a business that transmits electronic information over telecommunications lines: an on-line bookstore.
available or operating on a computer or computer network
: an on-line dictionary.
by means of or using a computer: on-line shopping.
Radio. (of a network) supplying affiliated stations with all or a substantial part of their programming.
Television. of or pertaining to the final editing of a videotaped program.
done or accomplished while in operation or active service: on-line maintenance.
located on major routes or rail lines: on-line industries.
with or through a computer, especially over a network.
Also, online, on line.