mezzanine finance
noun [ U ]
ukus(also mezzanine financing) FINANCE
a form of lending to businesses in which a company that is borrowing pays a higher rate of interest than on other loans but has longer to pay back the debt, which may also be changed into shares in the company:
The 50-50 joint venture with Bank of Scotland will comprise about 20 per cent equity and the rest in debt and mezzanine finance.