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Definition of: backup

(bak′up′) noun
1. A support or backing.
2. An accumulation, as of water or waste, caused by a stoppage.
3. A substitute held in readiness for contingent use: often used attributively: a backup plan; a backup quarterback. Also back′-up′.

Most often used phrases:

backup vocals
backup quarterback
backup catcher
backup singer
backup singers
backup software
backup dancers
backup band
backup crew
sang backup
online backup
backup vocalist
backup power
guitar backup
backup system

'backup' used in million biggest domains list by Alexa.com:

mypcbackup.com
akeebabackup.com
backup.com
dtcbackup.com
todo-backup.com
backupify.com

'backup' used in other domains:

dmvbackup.com
binarybackup.com
remoteonlinebackups.com
portablebackuppower.com
backupwolf.com
my-ftpbackup.com

Statistical data

"backup" has the frequency of use of 0.0011% on city-data.com forum

"backup" has the frequency of use of 0.0012% on en.wikipedia.org.

Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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