What is the meaning of Mortgage?

A legal agreement in which a borrower pledges real property as collateral for a loan used to purchase or refinance that property.

The state of being pledged.

To borrow against a property, to obtain a loan for another purpose by giving away the right of seizure to the lender over a fixed property such as a house or piece of land; to pledge a property in order to get a loan.

To pledge and make liable; to make subject to obligation; to achieve an immediate result by paying for it in the long term.

Source: wiktionary.org