Definition of Backup
Backup
Back·up
Definition/Meaning
(noun)
A copy of data or a system that can be used in case the original is lost or fails.
e.g. The company keeps a backup of all important files on an external hard drive.
(noun)
a copy of the data on a computer, typically taken as a precaution against the loss of the actual data, or the action of taking such a copy;
e.g. This disc has a backup of the most important files, in case the originals accidentally get deleted.
(noun)
(American) a collection and often overflow of something, caused by its flow stopping;
e.g. There was a backup of water in the sink because something was blocking the drain.
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