dim - verb

• switch (a car's headlights) from a higher to a lower beam
• become dim or lusterless
• make dim or lusterless
• make dim by comparison or conceal
• become vague or indistinct

dim - adjective

• made dim or less bright
• lacking in light; not bright or harsh
• lacking clarity or distinctness
• offering little or no hope
• slow to learn or understand; lacking intellectual acuity

dim - thesaurus

black   bleak   blind   blur   dense   dimmed   dip   dull   dumb   faint   obtuse   shadowy   slow   slur   subdued   vague   wispy