[+file, disk] faire une copie de sauvegarde de
→ I'd forgotten to back up my disks.
→ His employers backed him up.
→ My parents have always backed me up.
[+views, statement, theory, sb's words] confirmer
→ Her views are backed up by an official report on crime.
→ There is no evidence to back up your statement.
→ Radio signals received from the galaxy's centre back up the black hole theory.
If I say I was at your house, will you back me up? Si je dis que j'étais chez toi, tu peux le confirmer?
→ The girl denied being there, and the man backed her up.
→ Can you back your car up a bit? I haven't got enough space to get out.
→ He backed up a few feet and stopped.
Translation English - French Collins Dictionary
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"Collins English French Electronic Dictionary © HarperCollins Publishers 2005"