backup - 1a. A reserve or substitute. b. Computer Science A copy of a program or file that is stored separately from the original. 2a. Support or backing. b. Music A background accompaniment, as for a performer. 3. An overflow or accumulation caused by clogging or by a stoppage: a backup in the sink; a backup of traffic at the drawbridge. ; дс тдрлими цюлютдажкию дроемжки аиакиохдйис лидр http://www.bartleby.com/61/67/B0016700.html;
