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back up in WordNet English dictionary
verb- establish as valid or genuine
"Can you back up your claims?"
back back up
- move backwards from a certain position
"The bully had to back down"
back up back off back down
- become or cause to become obstructed
"The leaves clog our drains in the Fall"; "The water pipe is backed up"
clog choke off clog up back up congest choke foul
- make a copy of (a computer file) especially for storage in another place as a security copy
"You'd better back up these files!"
back up
- give moral or psychological support, aid, or courage to
"She supported him during the illness"; "Her children always backed her up"
support back up
WordNet Lexical Database v3.0, © 2006 Princeton University
back up in English Wiktionary
- (verb) (computing) To copy (data) as a security measure.
- (verb) (intransitive) To move backwards, especially for a vehicle to do so.
- (verb) (transitive) To move a vehicle backwards.
- (verb) To provide support or the promise of support.
- (verb) (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) (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.
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