Definition of "backup" []

• A reserve or substitute. (noun)
• Computer Science A copy of a program or file that is stored separately from the original. (noun)
• Support or backing. (noun)
• Music A background accompaniment, as for a performer. (noun)
• An overflow or accumulation caused by clogging or by a stoppage: a backup in the sink; a backup of traffic at the drawbridge. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "For example, if you put the backup and restore scripts in a folder called h: \backup and your run the backup script, it will create a folder called h: \backup\tweedeckbackup and copy into it all your TweetDeck settings."
• "He said the Rangers have talked about him going to Triple-A Oklahoma City, which he calls a backup plan."
• "Time machine vs backup is kinda not of an equivilent I think."