disable /dɪsˈeɪbəl/verb 3adjective 1forms 5 verb3 •To render unable; to take away an ability of, as by crippling. •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. •To impair the physical or mental abilities of; to cause a serious, permanent injury.Falling off the horse disabled him. adjective1 •(no longer used) Lacking ability; unable.Our disable and unactive force. — 1595 formsdisabled · disabling · disables · more disable · most disable