noun, verb, -gaged, -gag⋅ing.| 1. | a conveyance of an interest in property as security for the repayment of money borrowed. |
| 2. | the deed by which such a transaction is effected. |
| 3. | the rights conferred by it, or the state of the property conveyed. |
| 4. | Law. to convey or place (real property) under a mortgage. |
| 5. | to place under advance obligation; pledge: to mortgage one's life to the defense of democracy. |

A legal agreement that creates an interest in real estate between a borrower and a lender. Commonly used to purchase homes, mortgages specify the terms by which the purchaser borrows from the lender (usually a bank or a savings and loan association), using his or her title to the house as security for the unpaid balance of the loan.
mortgage