dark

devoid or partially devoid of light or brightness; shadowed or black or somber-colored

• “sitting in a dark corner”
• “a dark day”
• “dark shadows”
• “the theater is dark on Mondays”
• “dark as the inside of a black cat”

(used of color) having a dark hue

• “dark green”
• “dark glasses”
• “dark colors like wine red or navy blue”

brunet (used of hair or skin or eyes)

• “dark eyes”

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

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”

secret

• “keep it dark”
• “the dark mysteries of Africa and the fabled wonders of the East”

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”

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”

marked by difficulty of style or expression

• “much that was dark is now quite clear to me”
• “those who do not appreciate Kafka”

having skin rich in melanin pigments

• “National Association for the Advancement of Colored People”
• “the dark races”
• “dark-skinned peoples”

not giving performances; closed

• “the theater is dark on Mondays”

absence of light or illumination

absence of moral or spiritual values

• “the powers of darkness”

an unilluminated area

• “he moved off into the darkness”

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

an unenlightened state

• “he was in the dark concerning their intentions”
• “his lectures dispelled the darkness”