OFFLINE

Etymology

Adjective

offline (not comparable)

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.

Antonym: online

(by extension) Happening in the physical world (the real world) as opposed to on the internet.

Synonym: IRL

Antonym: online

Adverb

offline (not comparable)

While offline; with an offline system.

Antonym: online

(corporate jargon) Outside the current meeting, in a more private setting.

Verb

offline (third-person singular simple present offlines, present participle offlining, simple past and past participle offlined)

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

Source: Wiktionary