backup B2 Topic:Space, Position & Direction US /ˈbækˌʌp/ See IPA manual Freq #3303 Meanings 1 noun A copy of computer files kept separately so you can recover them if the originals are lost. Always make a backup of your work in case your computer crashes. 2 noun Extra help or support, especially police officers sent to assist. The officer called for backup before approaching the building. 3 noun A person or thing kept ready to be used in place of another. If the goalkeeper gets injured, we have a backup ready to play. 4 noun A buildup of traffic or material caused by a blockage. The accident caused a long backup on the highway. Thesaurus Synonyms 1 noun · a copy of computer files... computer backup 3 noun · a person or thing kept... stand-insubstitute 4 noun · a buildup of traffic or... tailback More reservespare Word family Forms backups Derived forms autobackup Common collocations backup plan Adjective + noun Etymology Deverbal from back up. Topics Space, Position & Direction External links Cambridge Dictionary Wiktionary Google Images # backup **Type:** Word **Level:** B2 **Part of speech:** noun **IPA (US):** /ˈbækˌʌp/ **Frequency rank:** 3303 ## Meanings 1. A copy of computer files kept separately so you can recover them if the originals are lost. 2. Extra help or support, especially police officers sent to assist. 3. A person or thing kept ready to be used in place of another. 4. A buildup of traffic or material caused by a blockage. ## Examples - Always make a backup of your work in case your computer crashes. - The officer called for backup before approaching the building. - If the goalkeeper gets injured, we have a backup ready to play. - The accident caused a long backup on the highway. ## Synonyms - reserve - spare ## Derived Forms - autobackup ## Etymology Deverbal from back up. ## Topics - Space, Position & Direction markdown