Disabilities is an umbrella term, covering impairments, activity limitations, and participation restrictions. An impairment is a problem in body function or structure; an activity limitation is a difficulty encountered by an individual in executing a task or action; while a participation restriction is a problem experienced by an individual in involvement in life situations. (Source: WHO)

Person lacking one or more physical power, such as the ability to walk or to coordinate one's movements, as from the effects of a disease or accident, or through mental impairment. (Source: GEMET/CED)