NO LIGHT › with no light or not much light: It's a bit dark in here. It doesn't get dark until 9 o'clock in the evening.
NOT PALE › nearer to black than white in colour: dark blue/green dark clouds He's got dark hair and blue eyes.
PERSON › having black or brown hair or brown skin: a short, dark woman with glasses
BAD › frightening or unpleasant: a dark period in human history