Dictionary
fall•back
Pronunciation: (fôl'bak"), [key]—
n.
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.
—
adj.
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.