According to the Americans with Disabilities Act, a person with a disability is one who

A physical impairment is any medical disorder, condition, disfigurement, or loss affecting one of the body systems. A mental impairment is any mental or psychological disorder, including neurologically-based learning differences.

Some major life activities include caring for oneself, performing manual tasks, seeing, hearing, eating, sleeping, standing, walking, lifting, bending, speaking, breathing, learning, reading, concentrating, thinking, communicating, working, and major bodily functions.