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back up
verb
(tr) to support or assist
(intr) cricket (of a nonstriking batsman) to move down the wicket in readiness for a run as a ball is bowled
(of water) to accumulate
(of traffic) to become jammed behind an accident or other obstruction
computing to make a copy of (a data file), esp for storage in another place as a security copy
printing to print the second side of (a sheet)
to repeat an action immediately
noun
a support or reinforcement
a reserve or substitute
( as modifier )
backup troops
musical accompaniment, esp for a pop singer
( as modifier )
backup singer
the overflow from a blocked drain or pipe
computing a file or set of files copied for security purposes
Idioms and Phrases
Move or drive a vehicle backward, as in He told her to back up into the garage . [First half of 1800s]
Bring or come to a standstill, as in The water had backed up in the drains , or The accident had backed up traffic for miles . [First half of 1800s]
Support or strengthen, as in The photos were backed up with heavy cardboard so they couldn't be bent , or I'll back up that statement of yours . [Second half of 1700s]
Duplicate a file or program so that the original is not lost. For example, Every computer manual warns you to back up your work frequently in case of a power outage or computer failure . [Second half of 1900s]
Example Sentences
But soon after leaving, they were shocked to see their lodge back up for sale, in exactly the same lakeside spot, for £110,000 - £87,000 more than they'd been paid for it.
Siddiq has argued Bangladeshi authorities have not provided any evidence to back up their allegations and refuse to engage with her lawyers.
At home, David would get tossed around in driveway games by the cement contractor father who was twice his size, only to keep getting back up for more contact.
That timeline is backed up by a 2015 study, which concluded a full evacuation of Newport Beach’s tsunami-vulnerable areas could take almost 5 hours.
Later in the day, prosecutors brought back up the disagreement.
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