夹层融资是指在风险和回报方面介于优先债务和股本融资之间的一种融资形式。夹层融资一般采取次级贷款的形式，但也可以采用可转换票据或优先股的形式。对于公司和股票推荐人而言，夹层投资通常提供形式非常灵活的较长期融资，这种融资的稀释程度要明显小于股市，并能根据特殊需求作出调整。而夹层融资的付款事宜也可以根据公司的现金流状况确定。

对应的英文表达为：Mezzanine Financing （Mezzanine financing is a hybrid of debt and equity financing that gives the lender the right to convert the debt to an equity interest in the company in case of default, generally, after venture capital companies and other senior lenders are paid. In terms of risk, it exists between senior debt and equity.）