not bright or without sufficient light
slow to learn or understand; lacking intellectual acuity
(of an object or shape) not clearly seen because of distance, darkness, etc.
made dim or less bright
in a chatty manner
offering little or no hope
become dim or lusterless
make dim or lusterless
make dim by comparison or conceal
become vague or indistinct
switch (a car's headlights) from a higher to a lower beam