back up

Verb
Synonyms: supportback upback offback downbackclogchoke offclog upcongestchokefoul

WordNet 3.0

Verb (5)

  1. give moral or psychological support, aid, or courage to“She supported him during the illness”“Her children always backed her up”Synonyms: supportback up
  2. move backwards from a certain position“The bully had to back down”Synonyms: back upback offback down
  3. establish as valid or genuine“Can you back up your claims?”Synonyms: backback up
  4. make a copy of (a computer file) especially for storage in another place as a security copy“You'd better back up these files!”Synonyms: back up
  5. become or cause to become obstructed“The leaves clog our drains in the Fall”“The water pipe is backed up”Synonyms: clogchoke offclog upback upcongestchokefoul
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Webster's Dictionary (GCIDE)

back up \back" up\, v. t.

1.to serve as a backup[3] for (another person or persons); as, the patrolmen backed up the detectives as they went inside to make the arrest; the center fielder backed up the shortstop on the play. [PJC]

2.(Computers) to make a backup[5] of; as, the sysop backed up the purchasing data files every night. [PJC]

back up \back" up\, v. i.

1.to move in a reverse direction; -- used of vehicles or animals. [PJC]

2.to accumulate due to a blockage of flow; as, a traffic backup due to an accident; a sewage backup. [PJC]

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