Synonyms and Antonyms for back_up

1. back up (v.)

move backwards from a certain position

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2. back up (v.)

give moral or psychological support, aid, or courage to

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3. back up (v.)

establish as valid or genuine

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4. back up (v.)

become or cause to become obstructed

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5. back up (v.)

make a copy of (a computer file) especially for storage in another place as a security copy