Definitions
1.AdjectiveOf 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.; He only had the option to play offline games because there was no Wi-Fi."
2.AdjectiveHappening in the physical world (the real world) as opposed to on the internet."offline meetings; offline dating"
3.AdverbWhile offline; with an offline system.
4.AdverbOutside the current meeting, in a more private setting.
5.VerbTo take (a system, etc.) offline; to demote from an active or online state.
6.VerbTo raid another player's base while that player is not currently playing.