in the dark,
    1. in ignorance; uninformed: He was in the dark about their plans for the evening.
    2. in secrecy; concealed; obscure.
    keep dark, to keep as a secret; conceal: They kept their political activities dark.

Origin of dark

before 1000; (adj.) Middle English derk, Old English deorc; (noun and v.) Middle English, derivative of the adj.; compare Middle High German terken to darken, hide
Related formsnon·dark, adjectivepre·dark, adjective

Synonyms for dark

Synonym study

1. Dark, dim, obscure, gloomy, murky refer to absence or insufficiency of light. Dark implies a more or less complete absence of light: a dark night. Dim implies faintness of light or indistinctness of form (resulting from the lack of light or from imperfect vision): a dim outline. Obscure implies dimness that may arise also from factors that interfere with light or vision: obscure because of haze. Gloomy means cloudy, ill-lighted, dusky: a gloomy hall. Murky implies a thick or misty darkness: murky water.

Antonyms for dark

1. lighted. 2. bright. 8. cheerful. 9. pleasant. 12. clear. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for dark

Contemporary Examples of dark

Historical Examples of dark

British Dictionary definitions for dark



having little or no lighta dark street
(of a colour) reflecting or transmitting little lightdark brown Compare light 1 (def. 29), medium (def. 2)
  1. (of complexion, hair colour, etc) not fair or blond; swarthy; brunette
  2. (in combination)dark-eyed
gloomy or dismal
sinister; evila dark purpose
sullen or angrya dark scowl
ignorant or unenlighteneda dark period in our history
secret or mysteriouskeep it dark
phonetics denoting an (l) pronounced with a velar articulation giving back vowel resonance. In English, l is usually dark when final or preconsonantalCompare light 1 (def. 30)
go dark stock exchange informal (of a company) to remove itself from the register of major exchanges while continuing to trade


absence of light; darkness
night or nightfall
a dark place, patch, or shadow
a state of ignorance (esp in the phrase in the dark)


an archaic word for darken
Derived Formsdarkish, adjectivedarkly, adverbdarkness, noun

Word Origin for dark

Old English deorc; related to Old High German terchennen to hide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for dark

Old English deorc "dark, obscure, gloomy; sad, cheerless; sinister, wicked," from Proto-Germanic *derkaz (cf. Old High German tarchanjan "to hide, conceal"). "Absence of light" especially at night is the original meaning. Application to colors is 16c. Theater slang for "closed" is from 1916.


early 13c., from dark (adj.). Figurative in the dark "ignorant" first recorded 1670s.

Online Etymology Dictionary, © 2010 Douglas Harper

Idioms and Phrases with dark


In addition to the idioms beginning with dark

  • darken someone's door
  • dark horse

also see:

  • in the dark
  • keep someone in the dark
  • leap in the dark
  • shot in the dark
  • whistle in the dark
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.