Health – The protection of the bodies and minds of people from illness resulting from the materials, processes or procedures used in the workplace e.g. release of hazardous chemicals. 

Safety – The protection of people from physical injury. e.g. failing ceiling. Safety issues are those things that can hurt you whilst health issues are those things that make you sick. The borderline between health and safety is ill defined and the two words are normally used together to indicate concern for the physical and mental well-being of the individual at the place of work . 

Welfare – The provision of facilities to maintain the health and well-being of individuals at the workplace. Welfare facilities include washing and sanitation arrangements, the provision of drinking water, heating, lighting, etc. 

Environmental – This is concerned with those activities in the workplace which affect the environment (in the form of flora, fauna, water, air and soil) and, possibly, the health and safety of employees and others. e.g. emission of extremely high level of dust. 

Hazard – something that has the potential to do harm or cause a loss. Examples: Electricity, Hazardous substances, Working at Heights, Vehicles 

Risk- the probability of the occurrence of an adverse event. 

Risk = Severity x Probability 

Occupier – means the person who has control over a workplace and the work that is done there. 

Owner - means the person for the time being receiving rent for the premises in the connection with which the work is carried on, whether on his own account or as an agent or trustee for another person, or the person who would so receive the rent if the premises were let at a rent. 

Workplace - means any place where persons work or are employed including a factory, but does not include a private household where persons work or are employed only in domestic service.