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 译者Natalie,在一家西班牙律师事务所的北京办公室担任全职法律翻译,擅长翻译涉及医疗健康领域的法律文件。