add on clauseglossary / ADD-ON CLAUSE add-on clause. An installment-contract provision that converts earlier purchases into security for new purchases. [Cases: Secured Transactions 114, 146. C.J.S. Secured Transactions §§ 10, 83, 103–105.] 词条贡献者 译员Joanne,亚洲顶尖法学院国际贸易专业,擅长翻译涉及媒体、体育和娱乐领域的法律文件。