The "Interim UFC Lightweight Champion" is a title awarded in the Ultimate Fighting Championship (UFC) when the current champion is unable to defend their title due to injury, personal issues, or other reasons. This interim title allows fighters to compete for a championship while the main titleholder is unavailable, ensuring that the division remains active and competitive. The interim champion is recognized as a legitimate titleholder, but they are not the official champion until they face the current champion in a title unification bout. This system helps maintain interest in the lightweight division and provides opportunities for fighters to showcase their skills on a larger stage.