online or on-line, on line/ ˈɒnˈlaɪn, ˈɔn- /

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 online bookstore.
available or operating on a computer or computer network:
an online dictionary.
by means of or using a computer:
online shopping.

with or through a computer, especially over a network.

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