1. (of fabrics and paper) grown dark in colour over time
   "the darkened margins of the paper"
    
2. Become or made dark by lack of light
   "a darkened house"; "the darkened theatre"

1. Make dark or darker
   "darken a room"
    
2. Become dark or darker
   "The sky darkened"
    
3. Tarnish or stain
   "a scandal that darkened the family's good name"

See also: dark, old

Type of: alter, change, defile, maculate [literary], modify, soil, stain, sully, tarnish

Antonym: brighten, lighten

Encyclopedia: Darken, Eric