adjective “online”
 base form online (more/most)
- connected to the Internet Sign up to see the translation of definitions and examples into any language. 
 I'll be online tonight, so I can reply to your email. 
- available through the Internet I prefer to read online newspapers. 
- connected to a network The database is online and can be accessed by all departments. 
- active or operational The new power plant is online and supplying electricity. 
adverb “online”
- while connected to the Internet She works online and communicates with clients via email.