BACKUP

Definition of BACKUP

  1. (noun)an accumulation caused by clogging or a stoppage
  2. (noun)someone who takes the place of another (as when things get dangerous or difficult)
  3. (noun)a musical part (vocal or instrumental) that supports or provides background for other musical parts
  4. (noun)(computer science) a copy of a file or directory on a separate storage device
  5. (noun)the act of providing approval and support