- adjective a second or third system, instrument or computer disk available to be used if the first one fails
- noun the providing of help
- noun a copy of a file or data or disk made as a security precaution.
- noun the process of making a copy of a file or data or disk as a security precaution
(written as BACKUP)a command to backup data from a hard disk onto floppy disks or a tape drive
- That part of a masonry wall behind the exterior facing.
- Any substance placed into a joint to seal the joint and reduce its depth, and/or to inhibit sagging of the sealant.
- overflow due to blockage in a piping system.
- Supporting documents for an estimate or schedule including detailed calculations, descriptions of data sources, and comments on the quality of the data.
- A duplicate copy of computer data available on an additional storage medium such as a floppy disk, to be used in case of need. Also called backup copy.
- Additional resources which are available to substitute those which fail. For example, a diode replacing another which has failed.
- Additional resources which serve to supplement others, such as backup battery.
Information & Library Science
- noun a duplicate copy of a file on a computer
- noun a copy of saved data that can be used if the original is lost, or a second source of energy or facilities that may be used if the first source fails
- noun an additional assistance or resources available in the event of difficulty or failure
- noun a delay in a flight caused by too much air traffic