Definitions of dim:

• verb:   switch (a car's headlights) from a higher to a lower beam
• verb:   make dim or lusterless

  Example: "Time had dimmed the silver"

• verb:   become dim or lusterless

  Example: "The lights dimmed and the curtain rose"

• verb:   become or make darker
• verb:   become vague or indistinct
• verb:   make dim by comparison or conceal
• adjective:   lacking in light; not bright or harsh

  Example: "A dim light beside the bed"

• adjective:   lacking clarity or distinctness

  Example: "A dim figure in the distance"

• adjective:   made dim or less bright

  Example: "The dimmed houselights brought a hush of anticipation"

• adjective:   slow to learn or understand; lacking intellectual acuity

  Example: "Never met anyone quite so dim"

• adjective:   offering little or no hope

  Example: "Took a dim view of things"