An obligation, debt, or responsibility owed to someone; in fitness there is a legal obligation and responsibility to ensure the safety of all participants.
Something one is bound to do, or an obligation one is bound to fulfill, by law and justice. A liability may be enforced in court. Liabilities are usually financial or can be expressed in financial terms. Also, the probably cost of meeting such an obligation.
Legal responsibility. A health care provider is legally responsible for actions that fail to meet the standards of care or are grossly negligent, thereby causing harm to the patient.