Bond is a formal written agreement made amongst the parties to perform a certain act or stop from doing an act. Usually in legal language bond is made to appear before the court or stopping someone from doing an act of crime e.g. immoral trafficking or murder etc. The agreement is made in order to assure the other person that his act or abstain will be paid or some benefits will be acquired from the act or omission.  There are many other types of bond in law, like bail bond, appeal bond, appearance bond etc. are some terms which are commonly used in law