What does back up mean?

Looking for the meaning or definition of the word back up? Here's what it means.

Verb (idiomatic, intransitive) To move backwards, especially for a vehicle to do so. (idiomatic, transitive) To move a vehicle backwards. (idiomatic, intransitive) To undo one's actions. (idiomatic, intransitive) To reconsider one's thoughts. (computing) To copy (data) as a security measure. (idiomatic, transitive) To provide support or the promise of support. (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. (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, of a blockage) To halt the flow or movement of something. (idiomatic, intransitive, informal) To fill up because of a backlog. Find more words! 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What is the opposite of back up? Sentences with the word back up Words that rhyme with back up What is the past tense of back up? Translations for back up Nearby Definitions backup backtrolls backtrolling backtrollers backtroller backtrolled back-up backupable backuped backups back-ups backup vocalist