v. become vague or indistinct; "The distinction between the two theories blurred"

v. make dim by comparison or conceal

v. make dim or lusterless; "Time had dimmed the silver"

v. become dim or lusterless; "the lights dimmed and the curtain rose"

v. become or make darker; "The screen darkened"; "He darkened the colors by adding brown"

v. switch (a car's headlights) from a higher to a lower beam

adj. made dim or less bright; "the dimmed houselights brought a hush of anticipation"; "dimmed headlights"; "we like dimmed lights when we have dinner"

adj. slow to learn or understand; lacking intellectual acuity; "so dense he never understands anything I say to him"; "never met anyone quite so dim"; "although dull at classical learning, at mathematics he was uncommonly quick"- Thackeray; "dumb officials make some really dumb decisions"; "he was either normally stupid or being deliberately obtuse"; "worked with the slow students"

adj. offering little or no hope; "the future looked black"; "prospects were bleak"; "Life in the Aran Islands has always been bleak and difficult"- J.M.Synge; "took a dim view of things"