(1) Inherent capacity of a hazardous sustance or the potentiality of a physical situation to cause damages to people, property or environment. (2) Source of potential harm or a situation with a potential for harm. (3) The intrinsic property of a dangerous substance or physical situation, with a potential for creating damage to human health and/or the environment. (4) A chemical or physical condition that has the potential for causing damage to people, property, or environment. (5) A characteristic of the system/plant/process that represents a potential for an accident. In the reference document, it is the combination of a (hazardous) material and an operating environment such that certain unplanned events could result in an accident. (6) The danger, risk, chance, or probability of an unwanted event occurring. A hazard can be defined by the degree of probability that a certain material, activity, or condition will produce an unwanted event. (7) The potential for an energy flow(s) to result in an accident or otherwise adverse consequence.