lightless
1. [ adjective ] giving no light
Examples:

"lightless stars `visible' only to radio antennae"

Related terms: invisible
2. [ adjective ] without illumination
Synonyms: unlighted unlit unilluminated
Examples:

"came up the lightless stairs" "the unilluminated side of Mars" "through dark unlighted (or unlit) streets"

Related terms: dark
Similar spelling:   Lightle
  listless
  listlessly
  listlessness
  lightly
  licitly