1. [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.
2. [adjective] Happening in the physical world (the real world) as opposed to on the internet.
3. [adverb] While offline; with an offline system.
4. [adverb] (corporate jargon) Outside the current meeting, in a more private setting.
5. [verb] (computing) (transitive) To take (a system, etc.) offline; to demote from an active or online state.
