Definition of Dark

Adjective: dark (darker,darkest) daa(r)k

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"
(used of colour) having a dark hue
"dark green"; "dark glasses"; "dark colours like wine red or navy blue"
Brunet (used of hair, skin or eyes)
"dark eyes"
Stemming from evil characteristics or forces; wicked or dishonourable
"Darth Vader of the dark side"; "a dark purpose"; "dark undercurrents of ethnic hostility";
- black, sinister
Secret
"keep it dark"
Showing a brooding ill humour
"a dark scowl";
- dour, glowering, glum, moody, morose, saturnine, sour, sullen
Lacking enlightenment, knowledge or culture
"the dark ages"; "a dark age in the history of education";
- benighted
Marked by difficulty of style or expression
"much that was dark is now quite clear to me";
- obscure
Causing dejection
"the dark days of the war"; "a dark gloomy day";
- blue, dingy, disconsolate, dismal, gloomy, grim, sorry, drab, drear, dreary
Having skin rich in melanin pigments
"dark-skinned peoples";
- colored [US], coloured [Brit, Cdn], dark-skinned, non-white
Not giving performances; closed
"the theatre is dark on Mondays"

Noun: dark daa(r)k

Absence of light or illumination
- darkness
Absence of moral or spiritual values
"the powers of dark";
- iniquity, wickedness, darkness
An unilluminated area
"he moved off into the dark";
- darkness, shadow
The time after sunset and before sunrise while it is dark outside
- night, nighttime
An unenlightened state
"he was in the dark concerning their intentions";
- darkness