dim1 comparative dimmer, superlative dimmest
fairly dark or not giving much light, so that you cannot see well [≠ bright]:
in the dim light of the early dawn
a dim glow
a dim shape is one which is not easy to see because it is too far away, or there is not enough light:
The dim outline of a building loomed up out of the mist.
to disapprove of something:
Miss Watson took a dim view of Paul's behaviour.
a memory or understanding of something that is not clear in your mind [= vague]:
Laura had a dim recollection of someone telling her this before.
dim eyes are weak and cannot see well:
Isaac was old and his eyes were dim.
if your chances of success in the future are dim, they are not good:
Prospects for an early settlement of the dispute are dim.
a very long time ago - used humorously
You can be really dim sometimes!
a dimly lit room
She was only dimly aware of the risk.
—dimness noun [uncountable]