An instrument that creates a voluntarylien on real property to secure repaymentof a debt. The parties to a mortgage are themortgagor (borrower) and mortgagee (lender).
Merriam-Webster Online Dictionarymortgage
a conveyance of or lien against property (as for securing a loan) that becomes void upon payment or performance according to stipulated terms
a) the instrument evidencing the mortgage
b) the state of the property so - mortgaged
c) the interest of the in such property - mortgagee
to grant or convey by a mortgage
to subject to a claim or obligation - pledge