Synonyms: unilluminated, unlighted, unlit, lightless
Definition: without illumination
Usage: came up the lightless stairs; the unilluminated side of Mars; through dark unlighted (or unlit) streets
Similar words: dark
Definition: devoid of or deficient in light or brightness; shadowed or black
Usage: sitting in a dark corner; a dark day; dark shadows; dark as the inside of a black cat
Synonyms: lightless
Definition: giving no light
Usage: lightless stars `visible' only to radio antennae
Similar words: unseeable, invisible
Definition: impossible or nearly impossible to see; imperceptible by the eye
Usage: the invisible man; invisible rays; an invisible hinge; invisible mending