Definitions
1.adjectiveHaving an absolute or (more often) relative lack of light."The room was too dark for reading."
2.adjective(of colour) Dull or deeper in hue; not bright or light."my sister's hair is darker than mine; her skin grew dark with a suntan"
3.adjectiveHidden, secret, obscure.
4.adjectiveWithout moral or spiritual light; sinister, malign."a dark villain; a dark deed"
5.adjectiveConducive to hopelessness; depressing or bleak."the Great Depression was a dark time; the film was a dark psychological thriller"
6.adjectiveLacking progress in science or the arts; said of a time period.
7.adjectiveWith emphasis placed on the unpleasant aspects of life; said of a work of fiction, a work of nonfiction presented in narrative form or a portion of either."The ending of this book is rather dark."