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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for fallback