<p><strong>Noun</strong></p><ul><li>an act or instance of falling back.</li><li>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.</li></ul><p><strong>Adjective</strong></p><ul><li>of or designating something kept in reserve or as an alternative: The negotiators agreed on a fallback position.</li></ul>