A conveyance of property, upon condition, as security for the payment of a debt or the preformance of a duty, and to become void upon payment or performance according to the stipulated terms; also, the written instrument by which the conveyance is made.
State of being pledged; as, lands given in mortgage.
To grant or convey, as property, for the security of a debt, or other engagement, upon a condition that if the debt or engagement shall be discharged according to the contract, the conveyance shall be void, otherwise to become absolute, subject, however, to the right of redemption.
Hence: To pledge, either literally or figuratively; to make subject to a claim or obligation.
Bad debt is debt that makes you poorer. I count the mortgage on my home as bad debt, because I'm the one paying on it. Other forms of bad debt are car payments, credit card balances, or other consumer loans. Robert Kiyosaki
However my parents - both of whom came from impoverished backgrounds and neither of whom had been to college, took the view that my overactive imagination was an amusing quirk that would never pay a mortgage or secure a pension. J. K. Rowling