WHO Definitions (1983)
For the WHO (1983), impairment is any loss or abnormality of structure or function, psychological, physiological, or anatomical; disability relates to the absence, due to impairments, of the ability to perform an activity in the manner or within the range considered normal for a human being; and handicap refers to a disadvantage for an individual, a social consequence of impairment or disability that limits or prevents the fulfillment of a role considered normal depending on age group, sex, social, and cultural factors.
For WHO, disability is the lack (resulting from an impairment) of the ability to perform an activity normally.
Disability Definition in Chile (Ley 19.284)
DISABILITY: According to Ley 19.284, a person is considered...