Usually means: Create copy for data safety.
Definitions Related words Phrases (New!) Mentions Lyrics Colors (New!)
We found 35 dictionaries that define the word back up:

General (18 matching dictionaries)
  1. back up: Merriam-Webster.com
  2. back up: Oxford Learner's Dictionaries
  3. back-up, back up: Collins English Dictionary
  4. back up: Vocabulary.com
  5. Back-Up, Back-up, back-up, back up: Wordnik
  6. back-up, back (sth) up, back up: Cambridge Advanced Learner's Dictionary
  7. back-up, back up: Wiktionary
  8. back up: Dictionary.com
  9. Back Up (Dej Loaf song), Back Up (Snoop Dogg song), Back-up, Back up: Wikipedia, the Free Encyclopedia
  10. back up: Rhymezone
  11. back up: AllWords.com Multi-Lingual Dictionary
  12. Back-Up: American-Britih Dictionary
  13. back up: Phrasal Verb Page
  14. back up: Free Dictionary
  15. back up: Mnemonic Dictionary
  16. back-up, back up: Dictionary/thesaurus

Art (2 matching dictionaries)
  1. English-Chinese Dictionary of Graphic Communications (Big 5) (No longer online)
  2. Technical Glossary of Theatre Terms (No longer online)

Business (7 matching dictionaries)
  1. MoneyGlossary.com (No longer online)
  2. INVESTORWORDS (No longer online)
  3. Back-up: bizterms.net
  4. Back up: Bloomberg Financial Glossary
  5. back-up, back up: Legal dictionary
  6. Back Up: Financial dictionary
  7. Accounting, Business Studies and Economics Dictionary (No longer online)

Computing (2 matching dictionaries)
  1. back up: CCI Computer
  2. Back-up, back up: Encyclopedia

Medicine (1 matching dictionary)
  1. Back-up, back up: Medical dictionary

Slang (2 matching dictionaries)
  1. back up, back up, back up, back up, back up: Green’s Dictionary of Slang
  2. back-up: Urban Dictionary

Sports (1 matching dictionary)
  1. Back up: Sports Definitions

Tech (2 matching dictionaries)
  1. AUTOMOTIVE TERMS (No longer online)
  2. Schlumberger Oilfield Glossary (No longer online)

(Note: See back_ups as well.)

Definitions from Wiktionary (back up)

verb:  (idiomatic, intransitive) To move backwards, especially for a vehicle to do so.
verb:  (idiomatic, transitive) To move a vehicle backwards.
verb:  (idiomatic, intransitive) To undo one's actions.
verb:  (idiomatic, intransitive) To reconsider one's thoughts.
verb:  (idiomatic, computing, transitive) To copy (data) so that it can be restored if the main copy is lost.
verb:  (idiomatic, transitive) To provide support or the promise of support to.
verb:  (idiomatic, intransitive, cricket) For the non-striker to take a few steps down the pitch, in preparation to taking a run, just as the bowler bowls the ball.
verb:  (idiomatic, intransitive, cricket) For a fielder to position himself behind the wicket (relative to a team-mate who is throwing the ball at the wicket) so as to stop the ball, and prevent overthrows.
verb:  (idiomatic, intransitive, of a blockage) To halt the flow or movement of something.
verb:  (idiomatic, intransitive, informal) To fill up because of a backlog.
verb:  (obsolete, printing) To run a printing press in reverse.

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