first mortgageglossary / first mortgage A mortgage that is senior to all other mortgages on the same property. [Cases: Mortgages 151. C.J.S. Mortgages §§ 210–212, 226.] 词条贡献者 译员Joanne,亚洲顶尖法学院国际贸易专业,擅长翻译涉及媒体、体育和娱乐领域的法律文件。