extension agreementglossary / EXTENSION AGREEMENT extension agreement. An agreement providing additional time for the basic agreement to be performed. [Cases: Contracts 242. C.J.S. Contracts § 407.] 词条贡献者 法律翻译文楷,毕业于新加坡知名法学院,专注翻译各类与合并许可有关的法律文件。