Of an electrical light source: switched on and emitting light.
Often followed by with: shining with light; luminous, radiant; also, brightly coloured; vivid.
Aglow with activity or emotion.
Burning, lit, on fire.
Often followed by on or upon: to find by accident; to chance upon, to come upon.
Often followed by from or off: to get off an animal which one has been riding; to dismount; to descend or exit from a vehicle; hence, to complete one's journey; to stop.
Often followed by at, on, or upon: of something aloft: to descend and settle; to land, to lodge, to rest.
Chiefly in set alight: in flames, on fire; aflame.
Of a generator or power plant: connected to the grid.
Available over, or delivered from, the Internet.
Of a computer: actively connected to the Internet or to some other communications service.
Connected to the Internet.
Available on a computer system, even if not networked.
Of a system: active, particularly building facilities (such as power) or a factory or power plant.
Immersed in Internet culture. (Usually modified by an intensifier such as extremely or terminally)
To bring (a system, etc.) online; to promote to an active or running state.
While online; while in a running or active state, or connected to the Internet.