Definition: In finance, a "mortgager" is someone who borrows money from another party (usually a lender) to pay back their loan. They typically have some form of collateral or security attached to their loan, such as property or assets, and are responsible for repaying the amount borrowed. For example, if a person takes out a mortgage to buy a house, they are mortgaging their home to secure the loan. The lender (the borrower) is the "mortgagee"