back up

US /bæk ˈʌp/
UK /bæk ˈʌp/
"back up" picture
1.

to make a copy of information on your computer

:
•
You should always back up your important files.
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Did you remember to back up the system before the update?
:
archiveduplicatecopysave
2.

to support someone or something

:
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I'll back you up if you need help.
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The evidence doesn't back up his claims.
:
supportcorroboratesubstantiateverifyconfirm
3.

to move backward, especially a vehicle

:
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Can you back up a little so I can park?
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The truck had to back up to turn around in the narrow street.
:
reverseretreatrecede
:
backbackingfed up to the back teethon the up and upput/get someone's back uptake backcentre back