Backup vs Invalidate - What's the difference?

backup | invalidate |

As a noun backup

is a reserve or substitute.

As an adjective backup

is standby, reserve or extra.

As a verb invalidate is

to make invalid especially applied to contract law.



Alternative forms

* back-up


(en noun)
  • A reserve or substitute.
  • If the goalkeeper is injured, we have a backup .
  • (computing) A copy of a file or record, stored separately from the original, that can be used to recover the original if it is destroyed or damaged.
  • After the power failure, we had to restore the database from backup .
  • An accumulation of material that halts the flow or movement of something.
  • The blockage caused a backup in the plumbing.
  • (law enforcement) reinforcements
  • He's got a gun - you better send for backup .


    * (reserve ): reserve, stand-in, spare, substitute * (computing: copy of a file or record ): * (accumulation of material that halts flow ): block, blockage


  • Standby, reserve or extra.
  • I am only a backup player.
  • (computing) That is intended as a backup.
  • Make a backup copy of that file.


    * (reserve) extra, reserve, spare, standby

    Usage notes

    Back-up'' is an alternative spelling of backup. Both spellings are used as either a noun or an adjective. The verb ''back up is always spelled as two words and never with a hyphen.




  • To make invalid. Especially applied to contract law.
  • The circuit court judge's ruling was invalidated by a superior judge.


    * (l)


    * (l)