dark Definition

dark
adj

1. Without light.

Thesaurus: dim, shadowy, cloudy, foggy, gloomy, faint, vague, obscure; Antonym: bright, light, sunny, illuminated.
2. Said of a colour: not light or pale; closer to black than white.
3. Said of a person or the colour of their skin or hair: not light or fair.
4. Sad or gloomy.
5. Evil or sinister.

Example: dark powers
Thesaurus: evil, bad, immoral, corrupt, wicked, vile, sinister, satanic, occult, infernal, nefarious; Antonym: good.
6. Mysterious and unknown.

Example: a dark secret
Thesaurus: secret, cryptic, hidden, mysterious, mystic, obscure, puzzling; Antonym: obvious, clear.
7. Said of a theatre: closed.

noun

1. The absence of light.

Thesaurus: darkness, gloom, murk, dimness, murkiness; Antonym: brightness.
Form: the dark (usually)
2. The time of day when night begins and there is no more light.

Example: after dark
Thesaurus: night, night-time, nightfall, evening, dusk, twilight; Antonym: light, daytime.
3. A dark colour.

Derivative: darkish
adj

Derivative: darkness
noun

The absence of light
Thesaurus: gloom, dark, dusk, murk, blackness, murkiness; Antonym: brightness, daylight.

noun

The state or quality of being evil or sinister
Thesaurus: evil, wickedness, sin, corruption.

Idiom: in the dark

Not knowing or not aware of something.
Thesaurus: ignorant, uninformed, unaware, naive.

Idiom: keep it dark

To keep something secret.
Thesaurus: hide, conceal, keep secret, obscure.

Etymology: Anglo-Saxon deorc.