adj. & v.
adj. (dimmer, dimmest) 1 a only faintly luminous or visible; not bright. b obscure; ill-defined. 2 not clearly perceived or remembered. 3 colloq. stupid; slow to understand. 4 (of the eyes) not seeing clearly.
v. (dimmed, dimming) 1 tr. & intr. make or become dim or less bright. 2 tr. US dip (headlights). dim-wit colloq. a stupid person. dim-witted colloq. stupid, unintelligent. take a dim view of colloq. 1 disapprove of. 2 feel gloomy about. dimly adv. dimmish adj. dimness n.
[ OE dim, dimm, of unkn. orig. ]