Definition of backup in English:


Syllabification: back·up
Pronunciation: /ˈbakˌəp


  • 1Help or support: no police backup could be expected
    More example sentences
    • Support groups providing backup for people to resist the cravings are available in Darwen and Accrington, with a new group expected to start in Clitheroe next month.
    • A support boat will provide backup throughout the challenge.
    • The next meeting will take place in November and will include such items as assessment, support and backup.
    help, support, assistance, aid; reinforcements, reserves, additional resources
  • 1.1A person or thing that can be called on if necessary; a reserve: I’ve got a security force as backup the filter is an excellent backup to other systems [as modifier]: a backup generator
    More example sentences
    • Our plan would thus be incomplete without a provision for backup forces, included in most proposals for a rapid reaction force.
    • The Government is determined to bring in all necessary scientific backup to monitor the pollution risk and vowed to allocate whatever resources were required.
    • You've got a budget of $60 million and $10 million is reserved for backup players.
  • 2 Computing The procedure for making extra copies of data in case the original is lost or damaged: automatic online backup [as modifier]: a backup system
    More example sentences
    • So, as you build your computer data backup system, be sure to document your test procedures into handy checklists.
    • To ease the procedure you can use some automatic backup software.
    • Software upgrades routine backup and restore procedures will also take much less time.
  • 2.1An extra copy of data from a computer.
    More example sentences
    • You are allowed to copy it as a backup, unless specific provisions for replacement in the event of damage are provided by the manufacturer.
    • If it disappeared, then the actual copy would be gone, but not the backup.
    • The hosting company should have a backup of the site.
  • 3North American An overflow caused by a stoppage, as in water or automobile traffic: there are long backups on all routes
    More example sentences
    • Major interstates are now northbound, but it's slow going, with traffic backups across the region.
    • Those are the worst cities, but every city that has a population over that of Denver's is seeing major traffic backups.
    • This led to massive traffic backups in one of the busiest parts of the city.

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