dark

American Heritage® Dictionary of the English Language, Fourth Edition

1. adj. Lacking or having very little light: a dark corner.
2. adj. Lacking brightness: a dark day.
3. adj. Reflecting only a small fraction of incident light.
4. adj. Of a shade tending toward black in comparison with other shades. Used of a color.
5. adj. Having a complexion that is not fair; swarthy.
6. adj. Served without milk or cream: dark coffee.
7. adj. Characterized by gloom; dismal: took a dark view of the consequences.
8. adj. Sullen or threatening: a dark scowl.
9. adj. Difficult to understand; obscure: stories that are large in scope and dark in substance.
10. adj. Concealed or secret; mysterious: "the dark mysteries of Africa and the fabled wonders of the East” ( W. Bruce Lincoln).
11. adj. Lacking enlightenment, knowledge, or culture: a dark age in the history of education.
12. adj. Exhibiting or stemming from evil characteristics or forces; sinister: "churned up dark undercurrents of ethnic and religious hostility” ( Peter Maas).
13. adj. Being or characterized by morbid or grimly satiric humor.
14. adj. Having richness or depth: a dark, melancholy vocal tone.
15. adj. Not giving performances; closed: The movie theater is dark on Mondays.
16. adj. Linguistics Pronounced with the back of the tongue raised toward the velum. Used of the sound (l) in words like full.
17. n. Absence of light.
18. n. A place having little or no light.
19. n. Night; nightfall: home before dark.
20. n. A deep hue or color.
21. idiom. in the dark In secret: high-level decisions made in the dark.
22. idiom. in the dark In a state of ignorance; uninformed: kept me in the dark about their plans.

Century Dictionary and Cyclopedia

1. Without light; marked by the absence of light; unilluminated; shadowy: as, a dark night; a dark room.
2. Not radiating or reflecting light; wholly or partially black or gray in appearance; having the quality opposite to light or white: as, a dark object; a dark color.
3. Not fair: applied to the complexion: as, the dark-skinned races.
4. Lacking in light or brightness; shaded; obscure: as, a dark day; the dark recesses of a forest.
5. Characterized by or producing gloom; dreary; cheerless: as, a dark time in the affairs of the country.
6. Threatening; frowning; gloomy; morose: as, a dark scowl.
7. Obscure; not easily perceived or understood; difficult to interpret or explain: as, a dark saying; a dark passage in an author.
8. Hence Concealed; secret; mysterious; inscrutable as, keep it dark.
9. Blind; sightless.
10. Unenlightened, either mentally or spiritually; characterized by backwardness in learning, art, science, or religion; destitute of knowledge or culture; ignorant; uninstructed; rude: uncivilized: as, the dark places of the earth; the dark ages.
11. Morally black; atrocious; wicked; sinister.
12. n. The absence of light; darkness.
13. n. A dark place.
14. n. A dark hue; a dark spot or part.
15. n. A state of concealment; secrecy: as, things done in the dark.
16. n. An obscured or unenlightened state or condition; obscurity; a state of ignorance: as, I am still in the dark regarding his intentions.
17. In the dark; without light.
18. To grow or become dark; darken.
19. To remain in the dark; lurk; lie hidden or concealed.
20. To make dark; darken; obscure.
21. n. An obsolete form of darg.

Wiktionary

1. adj. Having an absolute or (more often) relative lack of light.
2. adj. of colour Dull or deeper in hue; not bright or light.
3. adj. Hidden, secret
4. adj. Without moral or spiritual light; sinister, malign.
5. adj. Conducive to hopelessness; depressing or bleak
6. adj. Lacking progress in science or the arts; said of a time period
7. adj. 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
8. adj. of a source of light Extinguished.
9. adj. gambling Having racing capability not widely known.
10. n. A complete or (more often) partial absence of light.
11. n. uncountable Ignorance.
12. n. uncountable Nightfall.

GNU Webster's 1913

1. 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
2. adj. Not clear to the understanding; not easily seen through; obscure; mysterious; hidden.
3. adj. Destitute of knowledge and culture; in moral or intellectual darkness; unrefined; ignorant.
4. adj. Evincing black or foul traits of character; vile; wicked; atrocious.
5. adj. Foreboding evil; gloomy; jealous; suspicious.
6. adj. obsolete Deprived of sight; blind.
7. n. Absence of light; darkness; obscurity; a place where there is little or no light.
8. n. The condition of ignorance; gloom; secrecy.
9. n. (Fine Arts) A dark shade or dark passage in a painting, engraving, or the like.
10. v. obsolete To darken; to obscure.

WordNet 3.0

1. adj. stemming from evil characteristics or forces; wicked or dishonorable
2. n. absence of light or illumination
3. adj. lacking enlightenment or knowledge or culture
4. adj. marked by difficulty of style or expression
5. adj. devoid of or deficient in light or brightness; shadowed or black
6. n. an unilluminated area
7. adj. (used of color) having a dark hue
8. adj. not giving performances; closed.
9. adj. secret.
10. n. the time after sunset and before sunrise while it is dark outside
11. adj. having skin rich in melanin pigments
12. n. absence of moral or spiritual values
13. adj. showing a brooding ill humor
14. adj. causing dejection
15. n. an unenlightened state
16. adj. brunet (used of hair or skin or eyes)