backup

Noun

• the act of providing approval and support
  • his vigorous backing of the conservatives got him in trouble with progressives
    

• (computer science) a copy of a file or directory on a separate storage device
  • he made a backup in case the original was accidentally damaged or erased
    

• a musical part (vocal or instrumental) that supports or provides background for other musical parts

• someone who takes the place of another (as when things get dangerous or difficult)
  • the star had a stand-in for dangerous scenes
    
  • we need extra employees for summer fill-ins
    

• an accumulation caused by clogging or a stoppage
  • a traffic backup on the main street
    
  • he discovered a backup in the toilet
    

Related words

• Synonyms: 
  backing , championship , patronage , computer backup , accompaniment , musical accompaniment , support , stand-in , substitute , relief , reliever , backup man , fill-in