Definitions
1.AdjectiveOf a system: connected (generally electrically) to a larger network.
Of a generator or power plant: connected to the grid.
Of a computer: actively connected to the Internet or to some other communications service."Is this modem online?"
2.AdjectiveOf a generator or power plant: connected to the grid.
3.AdjectiveOf a computer: actively connected to the Internet or to some other communications service."Is this modem online?"
4.AdjectiveAvailable over, or delivered from, the Internet."I prefer to read online newspapers."
5.AdjectiveConnected to the Internet."I'll be online tonight, so I'll be able to reply to your email."
6.AdjectiveAvailable on a computer system, even if not networked."Press the F1 key to access the online help.; The program comes with an online manual, supplied on compact disc."
7.AdjectiveOf a system: active, particularly building facilities (such as power) or a factory or power plant."The power is online.; Once this factory comes online, it will double car production in our country!"
8.AdjectiveImmersed in Internet culture. (Usually modified by an intensifier such as extremely or terminally)"terminally online"
9.AdverbWhile online; while in a running or active state, or connected to the Internet."He works online."
10.VerbTo bring (a system, etc.) online; to promote to an active or running state.