n. 1) a condition which prevents one from performing all usual physical or mental functions. This usually means a permanent state, like blindness, but in some cases is temporary. In recent times society and the law have dictated that people with disabilities should be accommodated and encouraged to operate to their maximum potential and have the right to participate in societal and governmental activity without impediments. Hence, access by ramps, elevators, special parking places and other special arrangements have become required in many states. 2) a legal impediment, including being a minor who can- not make a contract, or being insane or incompetent.