having very little or no light

a dark room.

radiating, admitting, or reflecting little light

a dark color.

approaching black in hue

a dark brown.

not pale or fair; swarthy

a dark complexion.

brunette; dark-colored

dark eyebrows.

having brunette hair

She's dark but her children are blond.

(of coffee) containing only a small amount of milk or cream.

gloomy; cheerless; dismal

the dark days of World War II.

sullen; frowning

a dark expression.

evil; iniquitous; wicked

a dark plot.

destitute of knowledge or culture; unenlightened.

hard to understand; obscure.

hidden; secret.

silent; reticent.

(of a theater) offering no performances; closed

The theaters in this town are dark on Sundays.

Phonetics .

(of an l- sound) having back-vowel resonance; situated after a vowel in the same syllable. Compare clear ( def. 24a ) .

(of a speech sound) of dull quality; acoustically damped.

the absence of light; darkness

I can't see well in the dark.

night; nightfall

Please come home before dark.

a dark place.

a dark color.

to make dark; darken.

Obsolete . to grow dark; darken. ?

in the dark

in ignorance; uninformed

He was in the dark about their plans for the evening.

in secrecy; concealed; obscure.

keep dark

to keep as a secret; conceal

They kept their political activities dark.