dark Definition in Cambridge American English Dictionary
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Definition of "dark" - American English Dictionary

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darkadjective [-er/-est only]

 us   /dɑrk/

dark adjective [-er/-est only] (WITHOUT LIGHT)

with little or no light, or having little brightness: It was too dark to see much of anything. What time does it get dark in the summer? Dark colors have less white in them: a dark blue dress dark hair/eyes

dark adjective [-er/-est only] (SAD)

unhappy or sad; gloomy : The report contains dark predictions about the future.

dark adjective [-er/-est only] (EVIL)

evil or threatening: He gave me a dark look when I criticized his work.
darkness
noun [U]  us   /ˈdɑrk·nəs/
The city was plunged into darkness by the power blackout.

darknoun [U]

 us   /dɑrk/

dark noun [U] (ABSENCE OF LIGHT)

the absence of light: Does eating carrots really help you to see in the dark? She arrived home well before/after dark (= before/after the sun had gone down).
(Definition of dark from the Cambridge Academic Content Dictionary © Cambridge University Press)
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