disabled

1. To render unable; to take away an ability of, as by crippling.
2. (chiefly of a person) To impair the physical or mental abilities of; to cause a serious, permanent injury.

   Falling off the horse disabled him.

3. To deactivate, to make inoperational (especially of a function of an electronic or mechanical device).

   The pilot had to disable the autopilot of his airplane.

noun

One who is disabled. (often used collectively as the disabled, but sometimes also singular)

1. Made incapable of use or action.
2. Having a disability.
3. Legally disqualified.