online online /ˈɔnˌlaɪn/

adjective

1. Being in progress now  ( on-line , online )
   being in progress now
    On-line editorial projects
   on-line editorial projects
   
2. Connected to a computer network or accessible by computer  ( on-line , online )
   connected to a computer network or accessible by computer
    An on-line database
   an on-line database
   
3. On a regular route of a railroad, bus or airline system  ( on-line , online )
   on a regular route of a railroad, bus or airline system
    On-line industries
   on-line industries