Definition of Backup
Backup
back·up
Definition/Meaning
(noun)
someone or something that serves as a support, substitute, or source of help that can be called on or used if needed;
e.g. We had volunteers as backup in case we needed more people to help at the event. She had an extra pen as backup in case hers stopped working.
(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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