Online vs. Realtime

Onlineadjective

Describes a system which is connected (generally electrically) to a larger network.

Onlineadjective

Describes a generator or power plant which is connected to the grid.

Onlineadjective

Describes a computer which is connected to the Internet or to some other communications service – i.e., not simply with the cable plugged in, but has established a connection to a larger network (e.g., by dialing up).

Onlineadjective

Available over, or delivered from, the Internet.

Onlineadjective

Connected to the Internet.

Onlineadjective

Available on a computer system, even if not networked.

Onlineadjective

Describes a system that is active, particularly building facilities (such as power) or a factory or power plant.

Onlineadverb

Describes actions performed over the Internet.

Online

connected by a communications line to a computer. Opposite of off-line.

Online

being in progress now; ongoing; as, on-line editorial projects.

Realtimeadjective

(computing) of a system that responds to events or signals within a predictable time after their occurrence; specifically the response time must be within the maximum allowed, but is typically synchronous.