backup
A reserve or substitute.
Example
“If the goalkeeper is injured, we have a backup.”
Other meanings
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.”
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.”
Synonyms
- reserve
- stand-in
- spare
- substitute
- line
Related words
- battery backup
Where this comes from
This definition is adapted from “backup” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.