back up

verb

1. tr to support or assist
2. intr cricket (of a nonstriking batsman) to move down the wicket in readiness for a run as a ball is bowled
3. (of water) to accumulate
4. (of traffic) to become jammed behind an accident or other obstruction
5. computing to make a copy of (a data file), esp for storage in another place as a security copy
6. printing to print the second side of (a sheet)
7. intr,usually foll byon to repeat an action immediately

noun

1. a support or reinforcement
2. 1. a reserve or substitute
   2. ( as modifier )

      backup troops

3. 1. musical accompaniment, esp for a pop singer
   2. ( as modifier )

      backup singer

4. the overflow from a blocked drain or pipe
5. computing a file or set of files copied for security purposes

Example Sentences

This appears to be backed up by the appearance of videos on social media showing men believed to be North Koreans in Russian uniforms, at what appear to be military training facilities in Russia.

From BBC

With Miocic backed up against the cage, Jones unleashed a crushing spinning back kick to the body which dropped the challenger, before the referee stepped in to end the contest.

From BBC

Winds are expected to ease during the weekend and then pick back up again next week with the return of the Santa Anas Tuesday through Thursday.

From Los Angeles Times

When he sees the $262-million quarterback stand back up in front of roaring fans and energized teammates, the answer is clear.

From Los Angeles Times

There are still far too many people who will pick him back up.

From Salon