[wikipedia] a legal agreement by which a bank or other creditor lends money at interest in exchange for taking title of the debtor's property, with the condition that the conveyance of title becomes void upon the payment of the debt.
[dictionary] the interest percent that a bank or other financial company charges you when you borrow money, or the interest percent it pays you when you keep money in an account
[mtgprofessor] how many years the borrower has to repay the mortgage
Adjustable Rate Mortgage
[investopedia] A mortgage on which the interest rate, after an initial period, can be changed by the lender.
Fixed Rate Mortgage
[bankrate] A mortgage in which the interest rate does not change throughout the term