back_up has definitions from the field of computer science
1
[ verb ] move backwards from a certain position

Synonyms

back_off back_down

Examples

"The bully had to back down"

Used in print

(Ralph B. Long. The Sentence and Its Parts: A...)

In the written_language then can be underlined or italicized to guide the reader here , but much of the time the written_language simply depends_on the reader 's alertness , and a careless reader will have to back_up and reread .

Related terms

withdraw withdrawal

2
[ verb ] give moral or psychological support, aid, or courage to

Synonyms

support

Examples

"She supported him during the illness" "Her children always backed her up"

Used in print

(Samuel Elkin, "The Ball Player," Nugget, 6: 5...)

But what you have n't got is the heart to back_up that talent with .

3
[ verb ] establish as valid or genuine

Synonyms

back substantiate

Examples

"Can you substantiate your claims?"

Used in print

(Musical America, LXXXI:5...)

And with what resource did Prokofieff back_up his Credo of words - with torrents of powerful music .

Related terms

confirm reinforce vouch

4
[ verb ] (computer science) make a copy of (a computer file) esp. for storage in another place as a security cop

Examples

"You'd better back up these files!"

Related terms

copy computer

5
[ verb ] become or cause to become obstructed

Examples

"The leaves clog our drains in the Fall" "The water pipe is backed up"

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