Princeton's WordNet

1. dark, darkness(noun)

   absence of light or illumination

2. iniquity, wickedness, darkness, dark(noun)

   absence of moral or spiritual values

   "the powers of darkness"

3. darkness, dark, shadow(noun)

   an unilluminated area

   "he moved off into the darkness"

4. night, nighttime, dark(noun)

   the time after sunset and before sunrise while it is dark outside

5. dark, darkness(adj)

   an unenlightened state

   "he was in the dark concerning their intentions"; "his lectures dispelled the darkness"

6. dark(adj)

   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"

7. dark(adj)

   (used of color) having a dark hue

   "dark green"; "dark glasses"; "dark colors like wine red or navy blue"

8. dark(adj)

   brunet (used of hair or skin or eyes)

   "dark eyes"

9. black, dark, sinister(adj)

   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

10. dark(adj)

    secret

    "keep it dark"

11. dark, dour, glowering, glum, moody, morose, saturnine, sour, sullen(adj)

    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"

12. benighted, dark(adj)

    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"

13. dark, obscure(adj)

    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"

14. blue, dark, dingy, disconsolate, dismal, gloomy, grim, sorry, drab, drear, dreary(adj)

    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"

15. colored, coloured, dark, dark-skinned, non-white(adj)

    having skin rich in melanin pigments

    "National Association for the Advancement of Colored People"; "dark-skinned peoples"

16. dark(adj)

    not giving performances; closed

    "the theater is dark on Mondays"

Kernerman English Learner's Dictionary

1. dark(adjective)ɑrk

   with little or no light

   too dark to see in the room; a very dark night

2. darkɑrk

   to become dark outside

   It'll be getting dark soon.

3. darkɑrk

   closer to black than white

   He wore dark clothes.; dark blue/green/brown/gray

4. darkɑrk

   the time when it becomes night

   The fireworks start at dark.; Be home before dark.

5. darkɑrk

   having no knowledge of

   I was completely in the dark about all the changes.

Wiktionary

1. dark(Noun)

   A complete or (more often) partial absence of light.

   Dark surrounds us completely.

2. dark(Noun)

   Ignorance.

3. dark(Noun)

   Nightfall.

   It was after dark before we got to playing baseball.

4. dark(Adjective)

   Having an absolute or (more often) relative lack of light.

   The room was too dark for reading.

5. dark(Adjective)

   Dull or deeper in hue; not bright or light.

6. dark(Adjective)

   Hidden, secret

7. dark(Adjective)

   Without moral or spiritual light; sinister, malign.

8. dark(Adjective)

   Conducive to hopelessness; depressing or bleak

   The Great Depression was a dark time.

9. dark(Adjective)

   Lacking progress in science or the arts; said of a time period

10. dark(Adjective)

    With emphasis placed on the unpleasant aspects of life; said of a work of fiction, a work of nonfiction presented in narrative form or a portion of either

    The ending of this book is rather dark.

11. dark(Adjective)

    Extinguished.

    Dark signals should be treated as all-way stop signs.

12. dark(Adjective)

    Having racing capability not widely known.

Origin: From derk, from deorc, from derkaz, from dʰerg-, from dʰer-. Cognate with derken, terken and Albanian terr.

Webster Dictionary

1. Dark(adj)

   destitute, or partially destitute, of light; not receiving, reflecting, or radiating light; wholly or partially black, or of some deep shade of color; not light-colored; as, a dark room; a dark day; dark cloth; dark paint; a dark complexion

2. Dark(adj)

   not clear to the understanding; not easily seen through; obscure; mysterious; hidden

3. Dark(adj)

   destitute of knowledge and culture; in moral or intellectual darkness; unrefined; ignorant

4. Dark(adj)

   evincing black or foul traits of character; vile; wicked; atrocious; as, a dark villain; a dark deed

5. Dark(adj)

   foreboding evil; gloomy; jealous; suspicious

6. Dark(adj)

   deprived of sight; blind

7. Dark(noun)

   absence of light; darkness; obscurity; a place where there is little or no light

8. Dark(noun)

   the condition of ignorance; gloom; secrecy

9. Dark(noun)

   a dark shade or dark passage in a painting, engraving, or the like; as, the light and darks are well contrasted

10. Dark(verb)

    to darken to obscure

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