dark

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

an unilluminated area

“he moved off into the darkness”

brunet (used of hair or skin or eyes)

“dark eyes”

devoid of or deficient in light or brightness; shadowed or black

“sitting in a dark corner”

not giving performances; closed

“the theater is dark on Mondays”

secret

“keep it dark”

having a dark hue

“dark green”

stemming from evil characteristics or forces; wicked or dishonorable

“Darth Vader of the dark side”

absence of light or illumination

causing dejection

“the dark days of the war”

absence of moral or spiritual values

“the powers of darkness”

lacking enlightenment or knowledge or culture

“the dark ages”