Pronunciation: (fôl'bak"), [key]
1. an act or instance of falling back.
2. something or someone to turn or return to, esp. for help or as an alternative: His teaching experience would be a fallback if the business failed.
Also,fall'-back".of or designating something kept in reserve or as an alternative: The negotiators agreed on a fallback position.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.