dim

 dim 1

•  adjective
• 

1    not bright or easy to see:
?the dim light of a winter evening
2    dim memory/awareness etc something that you do not remember or understand well:
?I had only a dim memory of my grandparents.
3    informal, especially BrE stupid:
?She can be really dim at times!
dimly adverb

dim 2

• verb [I,T]

to become less bright, or make something less bright:
?Could you dim the lights a little?