unitization clauseglossary / UNITIZATION CLAUSE unitization clause. Oil & gas. A provision in an oil-and-gas lease granting the lessee the right to unitize the leased premises, generally for enhanced-recovery operations. 词条贡献者 法律翻译李黎,毕业于欧洲顶尖的高级翻译学院,专注翻译各类与福利、薪酬及雇佣有关的法律文件。