dark in WordNet English dictionary

1. lacking enlightenment or knowledge or culture
   "this benighted country"; "benighted ages of barbarism and superstition"; "the dark ages"; "a dark age in the history of education"
   benighted  dark 
   
2. stemming from evil characteristics or forces; wicked or dishonorable
   "black deeds"; "a black lie"; "his black heart has concocted yet another black deed"; "Darth Vader of the dark side"; "a dark purpose"; "dark undercurrents of ethnic hostility"; "the scheme of some sinister intelligence bent on punishing him"-Thomas Hardy
   black  dark  sinister 
   
3. causing dejection
   "a blue day"; "the dark days of the war"; "a week of rainy depressing weather"; "a disconsolate winter landscape"; "the first dismal dispiriting days of November"; "a dark gloomy day"; "grim rainy weather"
   blue  dark  dingy  disconsolate  dismal  gloomy  grim  sorry  drab  drear  dreary 
   
4. having skin rich in melanin pigments
   "National Association for the Advancement of Colored People"; "dark-skinned peoples"
   colored  coloured  dark  dark-skinned  non-white 
   
5. devoid of or deficient in light or brightness; shadowed or black
   "sitting in a dark corner"; "a dark day"; "dark shadows"; "dark as the inside of a black cat"
   dark 
   
6. (used of color) having a dark hue
   "dark green"; "dark glasses"; "dark colors like wine red or navy blue"
   dark 
   
7. brunet (used of hair or skin or eyes)
   "dark eyes"
   dark 
   
8. secret
   "keep it dark"
   dark 
   
9. showing a brooding ill humor
   "a dark scowl"; "the proverbially dour New England Puritan"; "a glum, hopeless shrug"; "he sat in moody silence"; "a morose and unsociable manner"; "a saturnine, almost misanthropic young genius"- Bruce Bliven; "a sour temper"; "a sullen crowd"
   dark  dour  glowering  glum  moody  morose  saturnine  sour  sullen 
   
10. not giving performances; closed
    "the theater is dark on Mondays"
    dark 
    
11. marked by difficulty of style or expression
    "much that was dark is now quite clear to me"; "those who do not appreciate Kafka's work say his style is obscure"
    dark  obscure 
    

1. an unenlightened state
   "he was in the dark concerning their intentions"; "his lectures dispelled the darkness"
   dark  darkness 
   
2. an unilluminated area
   "he moved off into the darkness"
   darkness  dark  shadow 
   
3. absence of light or illumination
   dark  darkness 
   
4. absence of moral or spiritual values
   "the powers of darkness"
   iniquity  wickedness  darkness  dark 
   
5. the time after sunset and before sunrise while it is dark outside
   night  nighttime  dark