What does "offline" mean?

To take (a system, etc.) offline; to demote from an active or online state.

What is a synonym for "offline"?

Common synonyms include: bad, broken, irl, kaput, meatspace, out of order.

//ɒfˈlaɪn// adj, adv, verb, slang

adj, adv, verb, slang ·Moderate ·High school level

Verb

1
To take (a system, etc.) offline; to demote from an active or online state. transitive
"Offlining a memory processor can be accomplished by using the flexible interleaving capability described earlier to interleave segments across subsets of the memory processors, avoiding the faulty one(s)."
2
To raid another player's base while that player is not currently playing.

Adjective

1
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. not-comparable
"I saved the web pages so I could read them later offline."
2
Happening in the physical world (the real world) as opposed to on the internet. broadly, not-comparable
"offline meetings"

Adverb

1
While offline; with an offline system. not-comparable
"The 2000 also emulates Diablo, Qume and NEC letter-quality printers, and has a large enough buffer memory to operate off line from the host computer for an hour."
2
Outside the current meeting, in a more private setting. not-comparable, slang
"At meetings, people cut off discussion by saying “Let’s continue that conversation offline,” even though they are meeting face to face, not online; “offline” is a new synonym for “in private,” as though everything public were now on the Internet."