BACKUP

[noun] - (someone or something that provides) support or help, or something that you have arranged in case your main plans, equipment, etc. go wrongWe're going to need some professional backup for this project. [U]The hospital has a backup generator in case there is a power failure.The party is going to be outdoors, so we'll need to organize somewhere as a backup in case it rains. [U]Remember, your colleagues are your backup system when things go wrong.(US) He's a backup (= plays if the person who usually plays is not available) for the Dallas Cowboys. [C](US) She used to be a backup singer for (= sing with) Whitney Houston.A backup is also a copy of information that is held on computer, which is stored separately from the computer.Before we leave work each day, we make a backup of all the records we have entered into the computer that day.The department's backup disks are all stored in a different building.