from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To make dark or darker.
- transitive v. To give a darker hue to.
- transitive v. To fill with sadness; make gloomy.
- transitive v. To render vague or uncertain; obscure: The sudden drop in stock prices darkened the future for investors.
- transitive v. To tarnish or stain: a scandal that darkened the family's good name.
- intransitive v. To become dark or darker.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To make dark or darker by reducing light.
- v. To become dark or darker (having less light).
- v. To make dark or darker in colour.
- v. To become dark or darker in colour.
- v. To render gloomy, dark(er) of mood
- v. To become gloomy, dark of mood
- v. To blind, impair eyesight
- v. To be blinded, loose clear vision
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To make dark or black; to deprive of light; to obscure.
- transitive v. To render dim; to deprive of vision.
- transitive v. To cloud, obscure, or perplex; to render less clear or intelligible.
- transitive v. To cast a gloom upon.
- transitive v. To make foul; to sully; to tarnish.
- intransitive v. To grow or darker.
from The Century Dictionary and Cyclopedia
- To grow dark or darker.
- To grow less white or clear; assume a darker hue or appearance: as, white paper darkens with age.
- To deprive of light; make dark or darker: as, to darken a room by closing the shutters.
- To obscure or shut out the light of.
- To render less white or clear; impart a darker hue to: as, exposure to the sun darkens the complexion.
- To obscure or cloud the meaning or intelligence of; perplex; render vague or uncertain.
- To render gloomy; sadden.
- To deprive of vision; strike with blindness.
- Hence To deprive of intellectual or spiritual light; sink in darkness or ignorance.
- To sully; make foul; make less bright or lustrous.
- To hide; conceal.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. become dark or darker
- v. make dark or darker
- v. tarnish or stain
From Middle English derkenen, dirkenen, from Old English *deorcnian, *diercnian (“to darken”), equivalent to dark + -en. Cognate with Scots derken, durken ("to darken"), Old High German tarchanjan, terchinen ("to darken"), Middle High German terken, derken ("to darken"). (Wiktionary)