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

• aurist
• aurochs
• aurora
• aurora australis
• aurora borealis
• auroral
• aurorean
• auroscope
• aurous
• aurum
• Auschwitz
• auscultate
• auscultation
• auscultatory
• auspex
• auspicate
• auspice
• auspices
• auspicious
• auspiciously
• auspiciousness
• Aussie
• Austen
• austenite
• austenitic