A disability is any condition of the body or mind (impairment) that makes it more difficult for the person with the condition to do certain activities (activity limitation) and interact with the world around them (participation restrictions).

An individual with a disability is defined by the ADA as a person who has a physical or mental impairment that substantially limits one or more major life activities, a person who has a history or record of such an impairment, or a person who is perceived by others as having such an impairment.

Some common synonyms of disable are cripple, debilitate, enfeeble, sap, undermine, and weaken. While all these words mean "to lose or cause to lose strength or vigor," disable suggests bringing about impairment or limitation in a physical or mental ability. disabled by an injury sustained at work.

Differently-abled, Special, Gifted Use “person with disability” or “disabled person” instead. Terms like “differently-abled,” although well-meaning, can be received as “condescending, offensive or simply a way of avoiding talking about disability” [NCDJ].