Definition of jack in or into in English:
informal Log into or connect up (a computer or electronic device).
- Given that Neo had spent his entire life inside The Matrix - more accurately, inside a pod of goo while jacked into a massive computer - how could his ear be pierced?
- She was able to jack into the computer's mind and learn what it knew.
- Bandwidth is often seen as a public resource, and people who would blanch at the thought of breaking into a computer room wouldn't think twice about jacking into wireless networks.
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