WHO Definition of Disability

"Disabilities" is an umbrella term, covering impairments, activity limitations, and participation restrictions.

Impairment - a problem in body function or structure
Activity limitation - a difficulty encountered by an individual in executing a task or action
Participation restriction - a problem experienced by an individual in involvement in life situations

→ disability is a complex phenomenon, reflecting an interaction between features of a person's body and features of the society in which he or she lives.