Health: A state of complete physical, mental & social well-being and not merely the absence of disease or infirmity. (World Health Organization)

Safety: It refers to all aspects of maintaining a healthy and safe environment where risk of personal injuries to employees is prevented at workplace.        

Welfare: Health, happiness and prosperity along with access to basic amenities such as drinking water, sanitary convenience (toilets, hand wash stations), first aid, changing and rest rooms.

Occupational or Work-related ill-health: Physical and mental disorders or illnesses caused due to workplace activities. The physiological or psychological or combination of both which may be induced by a particular work activity of the individual or by activities of other at workplace.

Accident: A major concern of safety at work is preventing accidents at work. An accident at work can be defined in different ways depending of the context in which it is used. Often also the word incident is used, sometimes as a broader term encompassing ‘an accident’ as a specific type of incident, but sometimes the words accidents and incidents refer to two different types of events.

It is an unplanned or uncontrolled event that results in injury or ill-health or damage or loss to property, where work process stoppage or interference, or any combination of these conditions exists.

Near Miss: It is an unplanned or uncontrolled event where no injury or damage occurs but has the potential to do so.

Dangerous Occurrence: It is an unplanned or uncontrolled event where there is no injury or ill-health but damage or loss to property occurs.