Definition of "Dark" :

noun: an unenlightened state

"He was in the dark concerning their intentions."

noun: an unilluminated area

"He moved off into the darkness."

noun: absence of light or illumination

noun: absence of moral or spiritual values

"The powers of darkness."

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

adjective: not giving performances; closed

"The theater is dark on Mondays."

adjective: brunet (used of hair or skin or eyes)

"Dark eyes."

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

"Sitting in a dark corner."

adjective: causing dejection

"The dark days of the war."

adjective: (used of color) having a dark hue

"Dark green."

adjective: marked by difficulty of style or expression

"Much that was dark is now quite clear to me."

adjective: lacking enlightenment or knowledge or culture

"The dark ages."

adjective: stemming from evil characteristics or forces; wicked or dishonorable

"Darth Vader of the dark side."

adjective: showing a brooding ill humor

"A dark scowl."

adjective: secret

"Keep it dark."