What is Vicarious Liability?

Legal Definition
Vicarious liability is a form of a strict, secondary liability that arises under the common law doctrine of agency, respondeat superior, the responsibility of the superior for the acts of their subordinate or, in a broader sense, the responsibility of any third party that had the "right, ability or duty to control" the activities of a violator. It can be distinguished from contributory liability, another form of secondary liability, which is rooted in the tort theory of enterprise liability because, unlike contributory infringement, knowledge is not an element of vicarious liability. 907 F. Supp. 1361, **36, citing 3 NIMMER ON COPYRIGHT ยง 12.04{A}{1}, at 12-70 (1995) The law has developed the view that some relationships by their nature require the person who engages others to accept responsibility for the wrongdoing of those others. The most important such relationship for practical purposes is that of employer and employee
-- Wikipedia
Legal Definition
Liability that a supervisory party (such as an employer) bears for the actionable conduct of a subordinate or associate (such as an employee) based on the relationship between the two parties. See respondeat superior

Under common law, a member of a conspiracy can be held vicariously liable for the crimes of his co-conspirators if the crimes committed by the co-conspirators were foreseeable and if they were committed with the intent of furthering the objective of the conspiracy. See conspiracy
Legal Definition
Obligation rising from a parties relationship with each other. Also known as vicarious responsibility.