back up

back up
1) PHRASAL VERB If someone or something backs up a statement, they supply evidence to suggest that it is true.

[V P n (not pron)] Radio signals received from the galaxy's centre back up the black hole theory...

[V P n (not pron)] Her views are backed up by a 1989 Home Office report on crime. [Also V n P]

2) PHRASAL VERB If an idea or intention is backed up by action, action is taken to support or confirm it.

[be V-ed P] The Secretary General says the declaration must now be backed up by concrete and effective actions...

[V P n (not pron)] It is time the Government backed up its advert campaigns with tougher measures. [Also V n P]

3) PHRASAL VERB If you back someone up, you show your support for them.

[V n P] His employers, Norfolk social services, backed him up. [Also V P n (not pron)]

4) PHRASAL VERB If you back someone up, you help them by confirming that what they are saying is true, even if you know it is not true.

[V n P] The girl denied being there, and the man backed her up. [Also V P n (not pron)]

5) PHRASAL VERB If you back up, the car or other vehicle that you are driving moves back a short distance.

[V P] Back up, Hans...

[V P] He backed up a few feet and rolled the window down...

[V P to n] A police van drove through the protesters and backed up to the front door of the house.

6) PHRASAL VERB If vehicles back up, they form a line of traffic which has to wait before it can move on.

[V-ed P] Traffic into London on the M11 was backed up for several miles. [Also VP, V P n (not pron)]

7) PHRASAL VERB If you back up, you move backwards a short distance.

[V P] I backed up carefully until I felt the wall against my back...

[V P amount] She backed up a few steps.

8) See also backup

English dictionary. 2008.

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