DictionarybackupRecovery copy
noun / adjective

backup

BAK-up/ˈbækʌp/

A reserve available when the primary resource fails.

The spare wheel provides a backup for the car's flat tire.

An open car trunk holds a ready spare wheel directly above a visibly flat rear tire, showing a reserve available when the primary equipment fails.
Etymology

Back up meant to stand behind and support someone. The noun turns that supporting role into a standby or reserve—a person, copy, or system available when needed.

In context

massiffe25:19
if oboes crack does everyone have a backup yeah I mean in the professional world most most people have to not just for that reason but it's a good reason to have a second one
Pre-Concert Conversation, Christa Wessel and Karen Wagner, 7 Dec 2013 mp4

More examples

  • The hospital switched to its backup generator.
  • The officer requested backup before entering the building.
  • Regular backups protect the work if a computer fails.

Forms

backup · backups

Similar words

reserve
Specifies something kept for future need rather than a duplicate copy.
spare
Usually means an extra item available for replacement.