Disability
The strict meaning of disability is the condition of a person who does not have the typical abilities of a healthy person.
Disability is a noun. Its root is ability. The dis- prefix means lack of. Disabled is an adjective that means impaired or damaged.
There are many types of disability both physical, mental or developmental, and a wide range of the amount of the disability. Some loss of ability is expected with age and is considered normal. A disability may occur due to illness or injury. Some may be temporary, while some may lead to a permanent condition.
The term disabled sometimes is used in a pejorative sense , and terms like differently-abled have come into existence. Some groups of disabled, such as the deaf, do not regard themselves as disabled and have developed a culture where hearing is considered unwanted.