Longman Dictionary of Contemporary English - dim

~1 adj dimmer, dimmest 1 »DARK« fairly dark or not giving much light, so that you cannot see well  (in the dim light of the early dawn) 2 »SHAPE« 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 large building loomed up out of the mist.) 3 »EYES« literary dim eyes are weak and cannot see well  (The dim eyes of the old woman were surprisingly attractive.) 4 dim recollection/awareness etc a memory or understanding of something that is not clear in your mind; vague (2)  (Laura had a dim recollection of someone telling her this before.) 5 future chances if your chances of success in the future are dim, they are not good  (Prospects for an early settlement of the dispute are dim.) 6 in the dim and distant past humorous a very long time ago 7 take a dim view of to disapprove of something  (We took a dim view of his disobedience.) 8 »UNINTELLIGENT« informal especially BrE not intelligent  (You can be really dim sometimes!) - dimly adv  (a dimly lit room | She was only dimly aware of the risk.) - dimness n ~2 v dimmed, dimming 1 if a light dims, or if you dim it, it becomes less bright  (The lights in the theatre began to dim.) 2 if a feeling or quality dims or is dimmed, it grows weaker  (Her beauty had not dimmed over the years. | His words dimmed our hopes of a peaceful settlement.) 3 dim your headlights/lights AmE to lower the angle of the front lights of your car, especially when someone is driving towards you; dip1 (3) BrE