The side that is distressing or undesirable.
The side of something that is in darkness or unlit, or has less illumination.
A style of electronic music, being a form of hardcore characterized by discordant sounds; darkcore.
Synonym of farside (“the side of a moon that faces away from the planet that it orbits”)
Synonym of nightside (“the side of a planet that faces away from the sun around which it orbits”)
The side that is evil.
A serious flaw in something otherwise good; a problem that ruins everything else.