Meaning & use
Backup
Last updated
A copy of data kept in reserve in case the original is lost or damaged, or a person or thing held in reserve to provide support.
See it in a sentence
Always keep a backup of your files on an external drive.
The coach sent in the backup quarterback after the starter was injured.
A note on using this word
Backup is written as one word when used as a noun or adjective, but the related verb phrase is spelled as two words: 'to back up.'
Words with a similar meaning
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Another way to use it
2. adjective
Serving as a substitute or support in reserve.
She kept a backup generator in case the power failed.
Make it your own
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