fallback
[ fawl-bak ]
/ ˈfɔlˌbæk /
noun
an act or instance of falling back.
something or someone to turn or return to, especially for help or as an alternative: His teaching experience would be a fallback if the business failed.
adjective
Also fall-back.
of or designating something kept in reserve or as an alternative: The negotiators agreed on a fallback position.
Origin of fallback
1750–60,
Americanism; noun, adj. use of verb phrase
fall back