(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"
showing the wearing effects of overwork or care or suffering; "looking careworn as she bent over her mending"; "her face was drawn and haggard from sleeplessness"; "that raddled but still noble face"; "shocked to see the worn look of his handsome young face"- Charles Dickens
loaded to excess or impeded by a heavy load; "a summer resort...encumbered with great clapboard-and-stucco hotels"- A.J.Liebling; "a hiker encumbered with a heavy backpack"; "an encumbered estate"