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Nanda,毕业于英国顶尖的高级翻译学院,专注翻译各种与证券和消费者集体诉讼有关的法律文件。