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back up
WIKTIONARY
back up
Verb
  • To move backwards, especially for a vehicle to do so. idiomatic, intransitive
  • To move a vehicle backwards. idiomatic, transitive
  • To undo one's actions. idiomatic, intransitive
  • To reconsider one's thoughts. idiomatic, intransitive
  • To copy (data) as a security measure. idiomatic, computing, transitive
  • To provide support or the promise of support. idiomatic, transitive
  • 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. 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. idiomatic, intransitive, cricket
  • To halt the flow or movement of something. idiomatic, intransitive, of a blockage