backup

Meanings

1. 1
   noun

   a copy of a file or directory on a separate storage device

   We made a backup in case the original was accidentally damaged or erased.

2. 2
   noun

   an accumulation caused by clogging or a stoppage

   a traffic backup on the main street

3. 3
   noun

   A reserve or substitute.

   If the goalkeeper is injured, we have a backup.

4. 4
   noun

   A copy of a file or record, stored separately from the original, that can be used to recover the original if it is damaged or destroyed.

   After the power failure, we had to restore the database from backup.

5. 5
   noun

   An accumulation of material caused by a (partial) obstruction or (complete) blockage of the flow or movement of the material, or an accumulation of material that causes an overflow due to the flow being greater than the maximum possible flow.

   The accident caused a mile-long backup on the highway.

6. 6
   noun

   Reinforcements.

   He's got a gun! You'd better send for backup.

7. 7
   noun

   Any support or extra help.

   This guy, he grabs the dog by the ears, stares it down like a cowboy in a showdown. The man regains control again. He scans the area, hoping for backup. Nothing. No neighbours, no dog whisperers, no animal control.

8. 8
   noun

   Accompaniment.

   Debbie Ahn, on piano, provided some mesmerizing back-up and many fiery, on-target solos.

Etymology

Deverbal from back up.