waiver
n. countable C1 Advanced US //ˈweɪvɝ// UK //wˈeɪvɐ// waiv·er
n. a formal statement that you give up a right or claim. You sign it to say you will not complain later.
n. a formal relinquishment of a known right or claim, typically documented in writing to prevent future dispute.
She signed the waiver before entering the gym.
The company requires every employee to sign a liability waiver before attending the annual retreat.
The court dismissed the lawsuit because the plaintiff had signed a comprehensive waiver releasing the hospital from all negligence claims.
From Anglo-Norman weyver, from waiver. Date: 1628. By surface analysis, waive + -er.