lightless

Definitions of lightless
  1. adjective
    giving no light
    “lightless stars `visible' only to radio antennae”
    synonyms:
    invisible, unseeable
    impossible or nearly impossible to see; imperceptible by the eye
  2. adjective
    without illumination
    “came up the lightless stairs”
    synonyms: unilluminated, unlighted, unlit
    dark
    devoid of or deficient in light or brightness; shadowed or black
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