adjective Of a system, currently not connected (generally electrically) to a larger network. For example, a power plant which is not connected to the grid, or a computer which is not connected to the Internet or to any other communications service.
I saved the web pages so I could read them later offline.
adjective Happening in the physical world (the real world) as opposed to on the internet.
offline meetings
adverb While offline; with an offline system.
adverb Outside the current meeting, in a more private setting.
verb To take (a system, etc.) offline; to demote from an active or online state.
verb To raid another player's base while that player is not currently playing.