Elementary (A2)
IPA: /ˈɒf.laɪn/
KK: /ˈɔfˌlaɪn/
Definition
Not connected to a computer or the Internet.
Example
I prefer to read books offline instead of on my tablet.
Conversation

I think I need a break from everything online and go offline for a while.

That sounds like a great idea! Disconnecting can really help clear your mind.

Yeah, sometimes being offline helps me feel more relaxed and focused.

Absolutely! You might discover new hobbies when you're not glued to a screen.
Synonyms & Antonyms
Synonyms
disconnected
unplugged
standalone
Definition
Not connected to a computer or the Internet.
Example
I prefer to work offline to avoid distractions from the Internet.
Conversation

Have you thought about spending some time offline this weekend?

Yeah, I really need a break from my phone and computer.

That sounds great! It would be nice to connect with nature offline.
Root Explanation
Offline → It is formed from "off" (meaning away or not in operation) and "line" (from Old English "līne", meaning a line or connection). The word "offline" means not connected to a network or system, indicating a state of being away from the line of communication.
Memory Tip
Think of being 'away' ('off') from a 'connection' ('line') — that's why offline means not connected.