1. Not on a regular route of a transportation system
   "an off-line ticket office" 
2. Not connected to a computer network
   "off-line resources"

Antonym: on-line

Encyclopedia: Off-line

• uncomplaining
• uncomplainingly
• uncomplete
• uncompleted
• uncomplicated
• uncomplimentary
• uncompounded
• uncomprehended
• uncomprehending
• uncomprehendingly
• uncomprehensible
• uncompress
• uncompromising
• uncompromisingly
• unconcealed
• unconcern
• unconcerned
• unconcernedly
• unconditional
• unconditionally
• unconditioned
• unconditioned reflex
• unconfessed
• unconfined
• unconfirmed