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We found 45 dictionaries with English definitions that include the word backup: Click on the first link on a line below to go directly to a page where "backup" is defined. General (23 matching dictionaries) backup: American Heritage Dictionary of the English Language [home, info] backup: Collins English Dictionary [home, info] backup: Vocabulary.com [home, info] backup: Macmillan Dictionary [home, info] backup: Merriam-Webster's Online Dictionary, 11th Edition [home, info] Backup, backup: Wordnik [home, info] backup: Cambridge Advanced Learner's Dictionary [home, info] Backup: Wiktionary [home, info] backup: Webster's New World College Dictionary, 4th Ed. [home, info] backup: The Wordsmyth English Dictionary-Thesaurus [home, info] backup: Infoplease Dictionary [home, info] backup: Dictionary.com [home, info] backup: UltraLingua English Dictionary [home, info] backup: Cambridge Dictionary of American English [home, info] BackUp, Backup (TV series), Backup (backup software), Backup (disambiguation), Backup (software), Backup (tactical): Wikipedia, the Free Encyclopedia [home, info] backup: Rhymezone [home, info] backup: Free Dictionary [home, info] backup: Mnemonic Dictionary [home, info] backup: WordNet 1.7 Vocabulary Helper [home, info] backup: LookWAYup Translating Dictionary/Thesaurus [home, info] backup: Dictionary/thesaurus [home, info] Art (1 matching dictionary) backup: ODLIS: Online Dictionary of Library and Information Science [home, info] Business (5 matching dictionaries) Backup: MoneyGlossary.com [home, info] Backup: Construction Term Glossary [home, info] backup: Legal dictionary [home, info] backup: Financial dictionary [home, info] backup: BusinessDictionary.com [home, info] Computing (8 matching dictionaries) backup: Free On-line Dictionary of Computing [home, info] Backup: CCI Computer [home, info] Backup: Technology Terms and Acronyms [home, info] Backup: Tech Terms Computer Dictionary [home, info] backup: Webopedia [home, info] Backup: Data Formats and Their Sugggested File Extensions [home, info] Backup: Technopedia [home, info] backup: Encyclopedia [home, info] Medicine (2 matching dictionaries) backup: online medical dictionary [home, info] backup: Medical dictionary [home, info] Miscellaneous (1 matching dictionary) BACKUP: Acronym Finder [home, info] Slang (3 matching dictionaries) Backup: Street Terms: Drugs and the Drug Trade [home, info] backup: The Folk File [home, info] Backup: Urban Dictionary [home, info] Sports (1 matching dictionary) backup: Hickok Sports Glossaries [home, info] Tech (1 matching dictionary) backup: Construction deterioration & building durability glossary [home, info]

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (backup) ▸ noun:  (computer science) a copy of a file or directory on a separate storage device ("He made a backup in case the original was accidentally damaged or erased") ▸ noun:  an accumulation caused by clogging or a stoppage ("A traffic backup on the main street") ▸ noun:  the act of providing approval and support ▸ noun:  a subordinate musical part; provides background for more important parts ▸ noun:  someone who takes the place of another (as when things get dangerous or difficult)