Second mortgage
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
One which takes rank immediately after & first mortgage on the same property, without any intervening liens, and is next entitled to satisfaction out of the proceeds of the property.
Green's Appeal, 97 Pa. 347.
Properly speaking, however, the term designates the second of a series of mortgages, not necessarily the second lien. For instance, the lien of a judgment might intervene between the first and second mortgages; in which case, the second mortgage would be the third lien.