Greek-English translations for εφεδρεία

• backup
  If the goalkeeper is injured, we have a backup.
  After the power failure, we had to restore the database from backup.
  The accident caused a mile-long backup on the highway.
• redundancy
• relay
  The CCTV cameras relay whats going on to the headquarters
  Can you relay this message to John?
• reserve
  The book is on reserve
  I accept your view with one reserve
  New oil reserves are continuously being discovered, but not as fast as the existing ones are running out