What is Bail-bond?

Legal Definition
An obligation to pay the court if a criminal defendant fails to meet the terms of conditional release from custody. Many bail bonds are signed by the defendant and the defendant's sureties (e.g., a bondsman). Some bail bonds are signed by the defendant only, who may need to deposit money with the court as security for the bond.

See Bail.
Legal Definition
When collateral is used to keep a defendant out of jail before the hearing. It's a percent of the total bond. It is taken if the person does not appear in court. A bail bondsman can help pay this debt.
Legal Definition
Practice, contracts. A specialty by which the defendant and other persons, usually not less than two, though the sheriff may take only one, become bound to the sheriff in a penalty equal to that for which bail is demanded, conditioned for the due appearance of such defendant to the legal process therein described, and by which the sheriff has been commanded to arrest him. It is only where the defendant is arrested or in the custody of the sheriff, under other than final process, that the sheriff can take such bond. On this bond being tendered to him, which he is compelled to take if the sureties are good, he must discharge the defendant. Stat. 23 H. VI. c. 9.

2. With some exceptions, as for example, where the defendant surrenders; 5 T. R. 754; 7 T. R. 123; 1 East, 387; 1 Bos. & Pull. 326; nothing can be a performance of the condition of the bail bond, but putting in bail to the action. 5 Burr. 2683.

3. The plaintiff has a right to demand from the sheriff an assignment of such bond, so that he may sue it for his own benefit. 4 Ann. c. 16, §20; Wats. on Sheriff, 99; 1 Sell. Pr. 126, 174. For the general requisites of a bail bond, see 1 T. R. 422; 2 T. R. 569 15 East. 320; 2 Wils. 69; 6 T. R. 702; 9 East, 55; . D. & R. 215; 4 M. & S. 338; 1 Moore, R. 514; 6 Moore, R. 264 East, 568; Hurls. on Bonds, 56; U. S. Dig. Bail V.
-- Bouviers Law Dictionary
Legal Definition
A bond executed by a defendant who has been arrested, together with other persons as sureties, naming the sheriff, constable, or marshal as obligee, in a penal sum proportioned to the damages claimed or penalty denounced, conditioned that the defendant shall duly appear to answer to the legal process in the officer's hands, or shall cause special bail to be put in, as the case may bs.
-- Black's Law Dictionary
Legal Definition
A bond given to secure the appearance of one at court.
-- Ballentine's Law Dictionary