Phrasal Verb - back something up

A phrase that combines a verb with a preposition or adverb or both and that functions as a verb whose meaning is different from the combined meanings of the individual words

Phrasal Verb:

back something up

Meaning / Example:

1. to drive a car backward.
> Will you back your car up a little?
> I will back up the car.

2. to cause objects to obstruct a pathway or channel and cause a slowdown in the flow.
> The wreck backed the cars up for a long way.
> Some dead branches and leaves backed the sewer up.

3. to give additional

4. support or evidence about something. (To support or strengthen the facts.)
> That backs up my story, all right.

Phrasal verbs are compound verbs that result from combining a verb with an adverb or a preposition. The resulting compound verb is idiomatic.

A compilation of 50 phrasal verbs.