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 译员李明,毕业于英国顶尖的高级翻译学院,专注翻译各种与调查和白领犯罪辩护有关的法律文件。