(computer science) a copy of a file or directory on a separate storage device; "he made a backup in case the original was accidentally damaged or erased"
an accumulation caused by clogging or a stoppage; "a traffic backup on the main street"; "he discovered a backup in the toilet"
tediously prolonged or tending to speak or write at great length; "editing a prolix manuscript"; "a prolix lecturer telling you more than you want to know"