What is the meaning of back up?


  • Give moral or psychological support, aid, or courage to.
    • usage: "She supported him during the illness"; "Her children always backed her up"
  • Move backwards from a certain position.
    • usage: "The bully had to back down"
  • Establish as valid or genuine.
    • usage: "Can you back up your claims"
  • Make a copy of (a computer file) especially for storage in another place as a security copy.
    • usage: "You'd better back up these files"
  • Become or cause to become obstructed.
    • usage: "The leaves clog our drains in the Fall"; "The water pipe is backed up"
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APAWordNet. (2010). back up. Retrieved April 22, 2019, from http://smartdefine.org/back_up/definitions/1258880
ChicagoWordNet. 2010. "back up" http://smartdefine.org/back_up/definitions/1258880 (accessed April 22, 2019).
HarvardWordNet 2010, back up, Smart Define, viewed 22 April, 2019, <http://smartdefine.org/back_up/definitions/1258880>.
MLAWordNet. "back up" 23 October 2010. Web. 22 April 2019. <http://smartdefine.org/back_up/definitions/1258880>
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